Oracle® Database 11g / 12c / 18c error codes ORA-12472: policy [string] is being used

ORA-12472: policy [string] is being used

Oracle Error Code: ORA-12472

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.