Message Oracle ORA-34061 - (MSEXECUT11) Session-only values cannot be added to non-unique concat dimension workspace object, or any of its base dimensions.

ERROR	(MSEXECUT11) Session-only values cannot be added to non-unique concat dimension workspace object, or any of its base dimensions.
CAUSE	Only UNIQUE concat dimensions can have custom member values.
ACTION	Use the CHGDFN command to change the concat dimension to UNIQUE and retry.