Message Oracle ORA-33217 - (CINSERT20) Custom member values cannot be added to concat dimension workspace object, or to any of its bases, because it is not defined as UNIQUE.

ERROR	(CINSERT20) Custom member values cannot be added to concat dimension workspace object, or to any of its bases, because it is not defined as UNIQUE.
CAUSE	Only UNIQUE concat dimensions can have custom member values.
ACTION	Use the CHGDFN command to change the concat dimension to UNIQUE and retry.