Diagnosis
For entity types with storage and use type 3 for which the checktable is predefined by the data element or domain, the other key fieldsin the check table must be mapped using relationships with therelationship type Leading. The assignment between the leadingentity type and the additional key field can only be made if the dataelement being used or the related domain can be assigned uniquely. Thereis no unique assignment in this case, since data element &V3& or therelated domain cannot be clearly identified in the check table &V4&.

System Response
The data model cannot be saved or activated.