Oracle : Ошибка ORA-12472

"policy %s is being used"
*Cause: The policy which was being dropped due to event propagation from
OID was applied to some table or schema.
*Action: Drop a policy in OID only if it is not used in any of the
databases using the policy.

Попробовать перевести

Поискать эту ошибку на форуме