How To Fix USMD1536 - Data model/entity type &1: Invalid hierarchy attribute

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 536

• Message text: Data model/entity type &1: Invalid hierarchy attribute

What causes this issue?

Entity types that the system references as
<DS:DE.USMD_RELATION_HRY>hierarchy attributes</> may only have external
key assignments. However, this is not the case for entity type &V2&,
which the system references as a hierarchy attribute for the
<DS:DE.USMD_ENTITY_NOD>node entity type</> &V3& in the hierarchy of
entity type &V4&.

System Response

The system cannot activate the data model.

How to fix this error?

Change the key assignment type for entity type &V2& or reference a
different entity type for the additional entity type &V3& in the
hierarchy for entity type &V4&.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.