unique constraint violation in SQL like persistance in ScheduledCommand table

[DudnykOleksandr]

Describe the bug
After some time DB keeps complaining about duplicate key value violations in ScheduledCommand table.

2024-12-22 17:34:51.017 UTC [20373] ERROR: duplicate key value violates unique constraint "IX_ScheduledCommand_CommandName_Data"
2024-12-22 17:34:51.017 UTC [20373] DETAIL: Key ("CommandName", "Data")=(ProcessWorkflow, b0d7c172-faf6-4cce-894c-eec895c9859f) already exists.
2024-12-22 17:34:51.017 UTC [20373] STATEMENT: INSERT INTO wfc."ScheduledCommand" ("CommandName", "Data", "ExecuteTime")

To Reproduce
Steps to reproduce the behavior:

1. Use a SQLite or postgreSQL as persistence
2. Create a complex workflow with external activity.
3. Use it for some time.

Expected behavior
No issues.

Additional context
Add any other context about the problem here.