Oracle : Ошибка ORA-30757

"cannot access type information"
*Cause: Either a subtype was created and operations performed with this
new type while the session was in progress, or
the type information was unpinned from the object cache.
*Action: Commit necessary changes, end the user session, reconnect
again and re-try the object operations.
If problem persists, contact your Oracle Support representative.

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