"plan/consumer_group %s is part of more than one top-plan"
*Cause: An attempt was made to 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 ancestors of the plan or consumer group and make sure
it is only part of the top-plan that includes the subtree being