Oracle : Ошибка ORA-22975

"cannot create a PRIMARY KEY-based REF to this object view"
*Cause: The object view specified in the MAKE_REF function does not
have a PRIMARY KEY-based object identifier. A PRIMARY KEY-based
REF cannot be created for such a view.
*Action: Specify an object view that has a PRIMARY KEY-based object
identifier in the MAKE_REF function.

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