Oracle : Ошибка ORA-31521

"CDC subscription %s already subscribes to publication ID %s column %s"
*Cause: A Change Data Capture subscription intended for import already
subscribed to a published column.
*Action: Either verify that the existing subscription has the desired
characteristics or drop the existing subscription and
perform the import again.

Попробовать перевести

Поискать эту ошибку на форуме