ORA-38860: cannot FLASHBACK DATABASE during instantiation of a logical standby
Cause: The command was not permitted because the controlfile indicates the database was in the process of becoming a logical standby database but the controlfile conversion had not completed.
Action: If in the process of creating a logical standby database, perform the remaining instantiation procedures to completion. If this flashback operation followed a Data Guard failure, permit the errant Data Guard operation to successfully complete. Once the instantiation is complete, reissue the flashback operation.