ORA-16623: stale DRC UID sequence number detected

Cause: The Data Guard broker detected a stale sequence value during its bootstrap or health check operations. The sequence value is changed each time a switchover or failover operation completes successfully. A database that is unavailable to participate in the switchover or failover operation will end up with a stale sequence number. Should the database attempt to rejoin the broker configuration, the broker will determine that the database missed a role change and will disable its management of that database. The broker disables the database since it may no longer be a viable standby database for the new primary database.

Action: Examine the broker configuration for databases that were disabled and which may require re-creation..

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