ORA-29388: plan/consumer_group string is part of more than one top-plan Cause: An attempt was madeto delete a subtree that includes a plan or consumer
group that is part of more than one top-plan as part of procedure DELETE_PLAN_
CASCADE or package DBMS_RESOURCE_MANAGER. Such a plan or consumer
group cannot be deleted. Action: Check the ancestorsof the plan or consumer group and make sure it is
only part of the top-plan that includes the subtree being deleted.