In this post, you’ll learn more about the Oracle ErrorORA-38731: Expected version string does not match string in log header. with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-38731: Expected version string does not match string in log header.
Reason for the Error ORA-38731: Expected version string does not match string in log header.
The version of the flashback database log file header was corrupt.
How to fix the Error ORA-38731: Expected version string does not match string in log header. ?
You can fix this error in Oracle by following the below steps
If you are doing a FLASHBACK DATABASE, then the flashback cannot be performed because of the corrupted log. A restore and an incomplete recovery must be performed instead.