ORA-16659: failover operation in progress
Cause: A primary database that restarted contacted a standby database that is being failed over to.
Action: Shut down the primary database and wait for failover to complete on the standby database. Once failover is complete, restart the old primary database. If the failover occurred due to fast-start failover, restarting the primary database after failover is complete allows it to be automatically reinstated as a standby database to the new primary database.
Error Type: ORA