Cause
A change number found in the redo log is lower than a previously encountered change number. The log is corrupted in some way. The corruption may be at the earlier change or at this one.
A change number found in the redo log is lower than a previously encountered change number. The log is corrupted in some way. The corruption may be at the earlier change or at this one.
Do recovery with a good version of the log or do time based recovery up to the indicated time.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/2532435
https://community.oracle.com/message/3184292
https://community.oracle.com/message/1380432
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