How To Fix DDLS274 - CDS view of a view extend cannot be changed, in this case (&1->&2)

DDLS274 - Overview

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 274

• Message text: CDS view of a view extend cannot be changed, in this case (&1->&2)

What causes this issue?

The enhancement of an existing CDS view &V1& was assigned to a different
CDS view &V2&. This change is not allowed.
Due to an earlier programming error, this change may still have been
carried out.

System Response

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

How to fix this error?

A new enhancement has to be created and this can then be assigned to CDS
view &V2&.
If this message occurs as a warning during an upgrade:
In this case, the change was still carried out. If &V1& is not activated
in its latest version during the upgrade, then &V1& should be
reactivated manually after the upgrade. This is required so that the
fields of the view extend of &V1& are removed.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS274 - CDS view of a view extend cannot be changed, in this case (&1->&2) ?

  The SAP error message DDLS274 indicates that you are trying to change a CDS (Core Data Services) view that is extending another CDS view, but the system does not allow this operation. This typically occurs when you attempt to modify the definition of a CDS view that is already being extended by another view.
  
  Cause:
  
  CDS View Extension: The error arises because the CDS view you are trying to change is being extended by another CDS view. In SAP, when a CDS view is extended, it creates a dependency that prevents changes to the original view's structure (like adding or removing fields) without first addressing the extensions.
  Dependency Management: SAP enforces strict dependency management to ensure that changes do not break existing functionality or data integrity. If a view is extended, any changes to the base view could potentially affect the extending views.
  
  
  Solution:
  
  Check Dependencies: Identify the CDS views that are extending the view