Oracle : Ошибка ORA-38861

"flashback recovery stopped before reaching recovery target"
*Cause: Flashback recovery on the standby ended early because the
user attempted to flashback to an SCN or time for which there were no
redo logs. Most likely, the user is trying to flashback to a future
time in the database that the database has never recovered through.
Check the alert log to find out which SCN the database recovered to.
*Action: Flashback to an older SCN or acquire the necessary redo logs.

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