Oracle : Ошибка ORA-38762

"redo logs needed for SCN %s to SCN %s"
*Cause: The FLASHBACK DATABASE operation failed. The recovery portion of
FLASHBACK DATABASE needed redo from the first SCN to the second,
but one or more of the redo logs in the range could not be read or
*Action: Check the FLASHBACK DATABASE command trace file for a
description of the inaccessible redo logs, restore access to
them, and retry the FLASHBACK DATABASE command.

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