When I try to issue the reinstate command after issuing the failover command on the standby database and try to rebuild the standby database using the reinstate command.
DGMGRL> reinstate database 'BHU_B';
Reinstating database "BHU_B", please wait...
Error: ORA-16653: failed to reinstate database
Reinstatement of database "BHU_B" failed
Reinstate fails since Flashback Database is disabled in the standby database.
Probably we can use the active standby database build or traditional standby database build to proceed further.