ORA-39897
        A required flashback log has been reused during flashback of a pluggable database.
        
        
        Cause
        At least one required flashback log has been reused during flashback of a pluggable database.
        Action
        You can no longer flashback this pluggable database to the same point-in-time as specified because a required flashback log file has been reused.  You may still be able to flashback this pluggable database to a more recent point-in-time. You can also recover the pluggable database to undo the effect of the failed flashback pluggable database operation.
        
     
    
    
        ORA-39897
        A required flashback log has been reused during flashback of a pluggable database.
        
        
        Cause
        At least one required flashback log has been reused during flashback of a pluggable database.
        Action
        You can no longer flashback this pluggable database to the same point-in-time as specified because a required flashback log file has been reused.  You may still be able to flashback this pluggable database to a more recent point-in-time. You can also recover the pluggable database to undo the effect of the failed flashback pluggable database operation.
        
     
    
    
        ORA-39897
        A required flashback log has been reused during flashback of a pluggable database.
        
        
        Cause
        At least one required flashback log has been reused during flashback of a pluggable database.
        Action
        You can no longer flashback this pluggable database to the same point-in-time as specified because a required flashback log file has been reused.  You may still be able to flashback this pluggable database to a more recent point-in-time. You can also recover the pluggable database to undo the effect of the failed flashback pluggable database operation.