Oracle : Ошибка ORA-19590

"conversation already active"
*Cause: You tried to begin a backup or restore conversation, but another
conversation is already active in this session.
*Action: Either continue the current conversation, or call BACKUPCANCEL or
RESTORECANCEL to end the current conversation before starting a
new one.

Попробовать перевести

Поискать эту ошибку на форуме