When I want to remove a scheduled dataflow with non-empty history, I have this error:
An error occured during the workflow deletion: "%An exception occurred while executing 'DELETE FROM cr_dataflow_scheduled WHERE id = ?' with params [9]: SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (`ezdataflow`.`cr_dataflow_job`, CONSTRAINT `FK_D0EA3FB85558A221` FOREIGN KEY (`scheduled_dataflow_id`) REFERENCES `cr_dataflow_scheduled` (`id`))%".