Oracle® Database 11g / 12c / 18c error codes ORA-12494: cannot insert or delete a level, category, or release category

ORA-12494: cannot insert or delete a level, category, or release category

Oracle Error Code: ORA-12494

Cause: You attempted to insert or delete a level, category, or release category definition.

Action: If the label definition is no longer valid, change its name to one that identifies it as invalid.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.