How To Fix CDS_UNIT_MESSAGE029 - Hierarchy testing of &1 is not possible.

CDS_UNIT_MESSAGE029 - Overview

• Message type: E = Error

• Message class: CDS_UNIT_MESSAGE - Message Class

• Message number: 029

• Message text: Hierarchy testing of &1 is not possible.

Since a test double already created for &V2& as part of &V3& testing of
&V4&.

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.

CDS_UNIT_MESSAGE029 - Details

• The SAP error message CDS_UNIT_MESSAGE029 ("Hierarchy testing of &1 is not possible") typically occurs in the context of Core Data Services (CDS) views when there is an issue related to the hierarchy structure of the data being queried or tested. This error can arise in various scenarios, such as when trying to execute a hierarchy-related query or when testing a CDS view that involves hierarchical data.
  Causes:
  
  Missing Hierarchy Definition: The hierarchy for the specified object (e.g., a characteristic or dimension) may not be defined or activated in the system.
  Incorrect Hierarchy Node: The hierarchy node being referenced may not exist or may not be valid for the given context.
  Data Inconsistencies: There may be inconsistencies in the underlying data that prevent the hierarchy from being processed correctly.
  Authorization Issues: The user may not have the necessary authorizations to access the hierarchy data.
  Technical Issues: There could be technical issues with the CDS view or the