Oracle Solution for Error ora-55520

ORA-55520: Log record in compatibility lower than 11.0

What triggered the Error:

The logical change record shows that the compatibility of the mined redo is lower than version 11.0. Flashback transaction works only on redo versions 11.0 and above.

What should we do to fix it:

Advance the compatibility and try to back out transactions that have occurred after the compatibility increase.