Message Oracle ORA-36640 - (XSDUNION19) Concat dimension workspace object cannot be changed to UNIQUE because base dimension workspace object does not have a TEXT or ID datatype.

ERROR(XSDUNION19) Concat dimension workspace object cannot be changed to UNIQUE because base dimension workspace object does not have a TEXT or ID datatype.
CAUSEBase dimensions of a unique concat must have TEXT or ID datatypes.
ACTIONNone