diff --git a/CHANGELOG.md b/CHANGELOG.md
index b589fd5d768..1e9afa70108 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ accidentally triggering the load of a previous DB version.**
 * #5218 Add role-level security to job error log
 * #5214 Fix use of prepared statement in async module
 * #5259 Lock down search_path in SPI calls
+* #5255 Fix year not multiple of day/month in nested CAgg
 
 ## 2.9.2 (2023-01-26)
 
diff --git a/tsl/src/continuous_aggs/create.c b/tsl/src/continuous_aggs/create.c
index 3252486a417..4721f182551 100644
--- a/tsl/src/continuous_aggs/create.c
+++ b/tsl/src/continuous_aggs/create.c
@@ -1113,6 +1113,17 @@ get_bucket_width(CAggTimebucketInfo bucket_info)
 			break;
 		case INTERVALOID:
 		{
+			/*
+			 * epoch will treat year as 365.25 days. This leads to the unexpected
+			 * result that year is not multiple of day or month, which is perceived
+			 * as a bug. For that reason, we treat all months as 30 days regardless of year
+			 */
+			if (bucket_info.interval->month && !bucket_info.interval->day &&
+				!bucket_info.interval->time)
+			{
+				bucket_info.interval->day = bucket_info.interval->month * DAYS_PER_MONTH;
+				bucket_info.interval->month = 0;
+			}
 			Datum epoch = DirectFunctionCall2(interval_part,
 											  PointerGetDatum(cstring_to_text("epoch")),
 											  IntervalPGetDatum(bucket_info.interval));
diff --git a/tsl/test/expected/cagg_on_cagg.out b/tsl/test/expected/cagg_on_cagg.out
index 8caa49f32d8..d352f8ff5a6 100644
--- a/tsl/test/expected/cagg_on_cagg.out
+++ b/tsl/test/expected/cagg_on_cagg.out
@@ -3652,3 +3652,406 @@ UNION ALL
 --
 DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
 DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+-- test some intuitive intervals that should work but
+-- were not working due to unix epochs
+-- validation test for 1 year on top of one day
+-- validation test for 1 year on top of 1 month
+-- validation test for 1 year on top of 1 week
+-- bug report 5231
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_50.bucket,
+    _materialized_hypertable_50.temperature
+   FROM _timescaledb_internal._materialized_hypertable_50
+  WHERE _materialized_hypertable_50.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(50)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(50)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_2TH_LEVEL
+                               View "public.conditions_summary_2"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_51.bucket,
+    _materialized_hypertable_51.temperature
+   FROM _timescaledb_internal._materialized_hypertable_51
+  WHERE _materialized_hypertable_51.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(51)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 year'::interval, conditions_summary_1.bucket) AS bucket,
+    sum(conditions_summary_1.temperature) AS temperature
+   FROM conditions_summary_1
+  WHERE conditions_summary_1.bucket >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(51)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 year'::interval, conditions_summary_1.bucket));
+
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'3 month\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_52.bucket,
+    _materialized_hypertable_52.temperature
+   FROM _timescaledb_internal._materialized_hypertable_52
+  WHERE _materialized_hypertable_52.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(52)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(52)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_2TH_LEVEL
+                               View "public.conditions_summary_2"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_53.bucket,
+    _materialized_hypertable_53.temperature
+   FROM _timescaledb_internal._materialized_hypertable_53
+  WHERE _materialized_hypertable_53.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(53)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 3 mons'::interval, conditions_summary_1.bucket) AS bucket,
+    sum(conditions_summary_1.temperature) AS temperature
+   FROM conditions_summary_1
+  WHERE conditions_summary_1.bucket >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(53)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 3 mons'::interval, conditions_summary_1.bucket));
+
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 month\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_54.bucket,
+    _materialized_hypertable_54.temperature
+   FROM _timescaledb_internal._materialized_hypertable_54
+  WHERE _materialized_hypertable_54.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(54)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 mon'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(54)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 mon'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_2TH_LEVEL
+                               View "public.conditions_summary_2"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_55.bucket,
+    _materialized_hypertable_55.temperature
+   FROM _timescaledb_internal._materialized_hypertable_55
+  WHERE _materialized_hypertable_55.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(55)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 year'::interval, conditions_summary_1.bucket) AS bucket,
+    sum(conditions_summary_1.temperature) AS temperature
+   FROM conditions_summary_1
+  WHERE conditions_summary_1.bucket >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(55)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 year'::interval, conditions_summary_1.bucket));
+
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_56.bucket,
+    _materialized_hypertable_56.temperature
+   FROM _timescaledb_internal._materialized_hypertable_56
+  WHERE _materialized_hypertable_56.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(56)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(56)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+psql:include/cagg_on_cagg_validations.sql:43: ERROR:  cannot create continuous aggregate with incompatible bucket width
+DETAIL:  Time bucket width of "public.conditions_summary_2" [@ 360 days] should be multiple of the time bucket width of "public.conditions_summary_1" [@ 7 days].
+\d+ :CAGG_NAME_2TH_LEVEL
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+psql:include/cagg_on_cagg_validations.sql:53: NOTICE:  materialized view "conditions_summary_2" does not exist, skipping
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 month\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_57.bucket,
+    _materialized_hypertable_57.temperature
+   FROM _timescaledb_internal._materialized_hypertable_57
+  WHERE _materialized_hypertable_57.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(57)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(57)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+psql:include/cagg_on_cagg_validations.sql:43: ERROR:  cannot create continuous aggregate with incompatible bucket width
+DETAIL:  Time bucket width of "public.conditions_summary_2" [@ 30 days] should be multiple of the time bucket width of "public.conditions_summary_1" [@ 7 days].
+\d+ :CAGG_NAME_2TH_LEVEL
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+psql:include/cagg_on_cagg_validations.sql:53: NOTICE:  materialized view "conditions_summary_2" does not exist, skipping
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
diff --git a/tsl/test/expected/cagg_on_cagg_dist_ht.out b/tsl/test/expected/cagg_on_cagg_dist_ht.out
index ac996e5760a..89ce0b91fac 100644
--- a/tsl/test/expected/cagg_on_cagg_dist_ht.out
+++ b/tsl/test/expected/cagg_on_cagg_dist_ht.out
@@ -3689,6 +3689,404 @@ UNION ALL
 --
 DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
 DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+-- bug report 5231
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_50.bucket,
+    _materialized_hypertable_50.temperature
+   FROM _timescaledb_internal._materialized_hypertable_50
+  WHERE _materialized_hypertable_50.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(50)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(50)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_2TH_LEVEL
+                               View "public.conditions_summary_2"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_51.bucket,
+    _materialized_hypertable_51.temperature
+   FROM _timescaledb_internal._materialized_hypertable_51
+  WHERE _materialized_hypertable_51.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(51)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 year'::interval, conditions_summary_1.bucket) AS bucket,
+    sum(conditions_summary_1.temperature) AS temperature
+   FROM conditions_summary_1
+  WHERE conditions_summary_1.bucket >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(51)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 year'::interval, conditions_summary_1.bucket));
+
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'3 month\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_52.bucket,
+    _materialized_hypertable_52.temperature
+   FROM _timescaledb_internal._materialized_hypertable_52
+  WHERE _materialized_hypertable_52.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(52)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(52)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 day'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_2TH_LEVEL
+                               View "public.conditions_summary_2"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_53.bucket,
+    _materialized_hypertable_53.temperature
+   FROM _timescaledb_internal._materialized_hypertable_53
+  WHERE _materialized_hypertable_53.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(53)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 3 mons'::interval, conditions_summary_1.bucket) AS bucket,
+    sum(conditions_summary_1.temperature) AS temperature
+   FROM conditions_summary_1
+  WHERE conditions_summary_1.bucket >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(53)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 3 mons'::interval, conditions_summary_1.bucket));
+
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 month\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_54.bucket,
+    _materialized_hypertable_54.temperature
+   FROM _timescaledb_internal._materialized_hypertable_54
+  WHERE _materialized_hypertable_54.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(54)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 mon'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(54)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 mon'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_2TH_LEVEL
+                               View "public.conditions_summary_2"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_55.bucket,
+    _materialized_hypertable_55.temperature
+   FROM _timescaledb_internal._materialized_hypertable_55
+  WHERE _materialized_hypertable_55.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(55)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 1 year'::interval, conditions_summary_1.bucket) AS bucket,
+    sum(conditions_summary_1.temperature) AS temperature
+   FROM conditions_summary_1
+  WHERE conditions_summary_1.bucket >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(55)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 1 year'::interval, conditions_summary_1.bucket));
+
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_56.bucket,
+    _materialized_hypertable_56.temperature
+   FROM _timescaledb_internal._materialized_hypertable_56
+  WHERE _materialized_hypertable_56.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(56)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(56)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+psql:include/cagg_on_cagg_validations.sql:43: ERROR:  cannot create continuous aggregate with incompatible bucket width
+DETAIL:  Time bucket width of "public.conditions_summary_2" [@ 360 days] should be multiple of the time bucket width of "public.conditions_summary_1" [@ 7 days].
+\d+ :CAGG_NAME_2TH_LEVEL
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+psql:include/cagg_on_cagg_validations.sql:53: NOTICE:  materialized view "conditions_summary_2" does not exist, skipping
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 month\''
+\ir include/cagg_on_cagg_validations.sql
+-- This file and its contents are licensed under the Timescale License.
+-- Please see the included NOTICE for copyright information and
+-- LICENSE-TIMESCALE for a copy of the license.
+\set CAGG_NAME_1ST_LEVEL conditions_summary_1
+\set CAGG_NAME_2TH_LEVEL conditions_summary_2
+--
+-- CAGG on hypertable (1st level)
+--
+CREATE MATERIALIZED VIEW :CAGG_NAME_1ST_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_1ST
+    time_bucket(:BUCKET_WIDTH_1ST, "time", :'BUCKET_TZNAME_1ST') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_1ST, "time") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM conditions
+GROUP BY 1
+WITH NO DATA;
+\d+ :CAGG_NAME_1ST_LEVEL
+                               View "public.conditions_summary_1"
+   Column    |           Type           | Collation | Nullable | Default | Storage | Description 
+-------------+--------------------------+-----------+----------+---------+---------+-------------
+ bucket      | timestamp with time zone |           |          |         | plain   | 
+ temperature | numeric                  |           |          |         | main    | 
+View definition:
+ SELECT _materialized_hypertable_57.bucket,
+    _materialized_hypertable_57.temperature
+   FROM _timescaledb_internal._materialized_hypertable_57
+  WHERE _materialized_hypertable_57.bucket < COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(57)), '-infinity'::timestamp with time zone)
+UNION ALL
+ SELECT time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text) AS bucket,
+    sum(conditions.temperature) AS temperature
+   FROM conditions
+  WHERE conditions."time" >= COALESCE(_timescaledb_internal.to_timestamp(_timescaledb_internal.cagg_watermark(57)), '-infinity'::timestamp with time zone)
+  GROUP BY (time_bucket('@ 7 days'::interval, conditions."time", 'UTC'::text));
+
+--
+-- CAGG on CAGG (2th level)
+--
+\set VERBOSITY default
+\set ON_ERROR_STOP 0
+\echo :WARNING_MESSAGE
+-- SHOULD WORK
+CREATE MATERIALIZED VIEW :CAGG_NAME_2TH_LEVEL
+WITH (timescaledb.continuous) AS
+SELECT
+  \if :IS_TIME_DIMENSION_WITH_TIMEZONE_2TH
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket", :'BUCKET_TZNAME_2TH') AS bucket,
+  \else
+    time_bucket(:BUCKET_WIDTH_2TH, "bucket") AS bucket,
+  \endif
+  SUM(temperature) AS temperature
+FROM :CAGG_NAME_1ST_LEVEL
+GROUP BY 1
+WITH NO DATA;
+psql:include/cagg_on_cagg_validations.sql:43: ERROR:  cannot create continuous aggregate with incompatible bucket width
+DETAIL:  Time bucket width of "public.conditions_summary_2" [@ 30 days] should be multiple of the time bucket width of "public.conditions_summary_1" [@ 7 days].
+\d+ :CAGG_NAME_2TH_LEVEL
+\set ON_ERROR_STOP 1
+\set VERBOSITY terse
+--
+-- Cleanup
+--
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_2TH_LEVEL;
+psql:include/cagg_on_cagg_validations.sql:53: NOTICE:  materialized view "conditions_summary_2" does not exist, skipping
+DROP MATERIALIZED VIEW IF EXISTS :CAGG_NAME_1ST_LEVEL;
 -- Cleanup
 \c :TEST_DBNAME :ROLE_CLUSTER_SUPERUSER;
 DROP DATABASE :DATA_NODE_1;
diff --git a/tsl/test/sql/cagg_on_cagg.sql b/tsl/test/sql/cagg_on_cagg.sql
index 3ad978b9b24..1020e443d40 100644
--- a/tsl/test/sql/cagg_on_cagg.sql
+++ b/tsl/test/sql/cagg_on_cagg.sql
@@ -244,3 +244,30 @@ SET timezone TO 'UTC';
 \set BUCKET_WIDTH_2TH 'INTERVAL \'1 month\''
 \set WARNING_MESSAGE '-- SHOULD WORK'
 \ir include/cagg_on_cagg_validations.sql
+
+-- test some intuitive intervals that should work but
+-- were not working due to unix epochs
+-- validation test for 1 year on top of one day
+-- validation test for 1 year on top of 1 month
+-- validation test for 1 year on top of 1 week
+
+-- bug report 5231
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'3 month\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 month\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 month\''
+\ir include/cagg_on_cagg_validations.sql
diff --git a/tsl/test/sql/cagg_on_cagg_dist_ht.sql b/tsl/test/sql/cagg_on_cagg_dist_ht.sql
index 556b99c7aa9..5350e59e6f7 100644
--- a/tsl/test/sql/cagg_on_cagg_dist_ht.sql
+++ b/tsl/test/sql/cagg_on_cagg_dist_ht.sql
@@ -265,6 +265,27 @@ SET timezone TO 'UTC';
 \set WARNING_MESSAGE '-- SHOULD WORK'
 \ir include/cagg_on_cagg_validations.sql
 
+-- bug report 5231
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 day\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'3 month\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 month\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 year\''
+\ir include/cagg_on_cagg_validations.sql
+
+\set BUCKET_WIDTH_1ST 'INTERVAL \'1 week\''
+\set BUCKET_WIDTH_2TH 'INTERVAL \'1 month\''
+\ir include/cagg_on_cagg_validations.sql
+
 -- Cleanup
 \c :TEST_DBNAME :ROLE_CLUSTER_SUPERUSER;
 DROP DATABASE :DATA_NODE_1;