diff --git a/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.legacy.update.ddl.sql b/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.legacy.update.ddl.sql
index 29c0d4388..a667699c9 100644
--- a/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.legacy.update.ddl.sql
+++ b/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.legacy.update.ddl.sql
@@ -1,4 +1,3 @@
-drop index nflow_archive_workflow_uniq;
+alter table nflow_archive_workflow drop constraint nflow_archive_workflow_uniq;
 
 create index idx_workflow_archive_type on nflow_archive_workflow(type);
-
diff --git a/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.update.ddl.sql b/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.update.ddl.sql
index af6e1ec9c..7e473bd96 100644
--- a/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.update.ddl.sql
+++ b/nflow-engine/src/main/resources/scripts/db/update-7.1.0-x/mysql.update.ddl.sql
@@ -1,4 +1,4 @@
-drop index nflow_archive_workflow_uniq;
+alter table nflow_archive_workflow drop constraint nflow_archive_workflow_uniq;
 
 create index idx_workflow_archive_type on nflow_archive_workflow(type);