Oracle : Ошибка ORA-38853

"cannot mark instance %s (redo thread %s) as disabled"
*Cause: The standby switchover or failover operation failed because it
needs to mark an instance (redo thread) as disabled. That instance
was up, which prevented it from being disabled.
*Action: Shut down the specified instance and retry this command.

Попробовать перевести

Поискать эту ошибку на форуме