ORA-55520：Log record in compatibility lower than 11.0
错误码
错误描述：Log record in compatibility lower than 11.0
错误原因：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.
解决方法：Advance the compatibility and try to back out transactions that have occurred after the compatibility increase.
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