Oracle : Ошибка ORA-24012

"cannot drop QUEUE_TABLE, some queues in %s have not been dropped"
*Cause: A queue exists in the queue table which has not been dropped.
All queues need to be dropped first.
*Action: Drop all queues belonging to this queue table using the drop_queue()
command. Be sure to stop the queues appropriately before dropping
them. Alternately, use the force option in drop_queuetable.

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