diff --git a/changelog.d/15868.feature b/changelog.d/15868.feature
new file mode 100644
index 000000000000..4ae287f23be2
--- /dev/null
+++ b/changelog.d/15868.feature
@@ -0,0 +1 @@
+Remove old rows from the `cache_invalidation_stream_by_instance` table automatically. (This table is not used when Synapse is configured to use SQLite.)
\ No newline at end of file