Oracle : Ошибка ORA-12495

"cannot disable an enabled level, category, or release category"
*Cause: You attempted to disable a level, category, or release category
that had previously been enabled. An enabled label definition
may be exist in some database label, so cannot be disabled.
*Action: If the label definition is no longer valid, change its name to
one that identifies it as invalid. When any labels are converted
to character strings, the new label definition will be used.

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