Oracle : Ошибка ORA-36638


"(XSDUNION17) %a %j %j\nConcat dimension %1p cannot be changed to UNIQUE because it has a non-unique concat base dimension %2p."
*Cause: A non-unique concat dimension cannot be used as a base of a dependent unique concat.
*Action: CHGDFN any non-unique concat base dimensions to UNIQUE and retry.

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