SAP Message USMD2221 - Sets contain entity type &1, which no longer exists

Diagnosis The entity &V2& of entity type &V3& contains sets of the entitiy typeV1. however, the entity type v1 is no longer in your data model. ithas probably been deleted. The set data of entity type &V1& is thereforeinvalid and will be deleted next time you save. Procedure Save the entity &V2& of entity type &V3& to clean up your invalid setdata.