seelmann commented on issue #4646: AIRFLOW-3543: Fix deletion of DAG with rescheduled tasks URL: https://github.com/apache/airflow/pull/4646#issuecomment-464487008 @feng-tao @ashb I made the change to use `ON DELETE CASCADE`. The DB schema needs to be changed by dropping the existing FK constraint and creating a new one. Additionally I added a migration to merge the existing 3 alembic heads. In CI one Kubernetes test failed but I think it's not related to this change.
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