SAP Message USMD1534 - Data model &1, entity type &2: Type of key assignment changed

Diagnosis Data model &V1& is already active and entity type &V2& is contained inthe active version. In this case, you may no longer change the type ofkey assignment for entity type &V2&. System Response The system cannot activate data model &V1&. Procedure Reset the type of key assignment for entity type &V2& in data model &V1&to #&V3&&V4&#.