Oracle : Ошибка ORA-38705

"Expected block size %s does not match %s in log header."
*Cause: When the flashback log file header was read, the block size
in the control file did not match the block size contained
in the header.
*Action: 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.

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