How To Fix USMD1047 - Data model &1, entity type &2: Leading entity type &3 cannot be assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 047

• Message text: Data model &1, entity type &2: Leading entity type &3 cannot be assigned

What causes this issue?

For entity types with storage and use type <LS>3</> for which the check
table is predefined by the data element or domain, the other key fields
in the check table must be mapped using relationships with <LS>Leading
</> as the relationship type. The assignment between the leading entity
type and the additional key field can only be made if the data element
or the related check table can be assigned uniquely. In this case, a
unique assignment is <ZH>not</> possible.

System Response

The data model cannot be saved or activated.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.