ORA-38855: cannot mark instance [string] (redo thread [string]) as enabled

Cause: The standby switchover or failover operation failed because it needs to mark an instance (redo thread) as enabled. However, it had less than 2 online redo logs, which prevented it from being enabled.

Action: Add more logfiles to the specified instance and retry the command.

Error Type: ORA

• Additional information for ORA-38855: cannot mark instance [string] (redo thread [string]) as enabled38855
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