Oracle : Ошибка ORA-33313

"(DELDENT05) %n cannot be deleted because it is the target of an external partition of a partitioned variable."
*Cause: User attempted to delete a variable, but some partitioned variable
was defined to use that variable as the target of one of its
external partitions.
*Action: DELETE the partitioned variable or CHGDFN DROP PARTITION the
the external partition from the partitioned variable, then
delete the target variable.

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