How To Fix CN634 - Not possible to change the project definition -> see long text

CN634 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 634

• Message text: Not possible to change the project definition -> see long text

What causes this issue?

The delivery information is still assigned to WBS elements in the
current project.

System Response

The project definition could not be changed, since delivery information
can only by assigned to one project.

How to fix this error?

To change the project definition, you must first delete the existing
assignments to the WBS elements.

Error message extract from SAP system. Copyright SAP SE.

CN634 - Details

• The SAP error message CN634, which states "Not possible to change the project definition -> see long text," typically occurs when there are restrictions on modifying a project definition in the Project System (PS) module. This error can arise due to various reasons, including:
  Causes:
  
  Project Status: The project may be in a status that does not allow changes. For example, if the project is completed or closed, modifications may be restricted.
  Authorization Issues: The user may not have the necessary authorizations to make changes to the project definition.
  Locked Project: The project might be locked for changes due to ongoing processes or workflows.
  Project Type Restrictions: Certain project types may have specific restrictions on modifications.
  Dependencies: There may be dependencies or relationships with other projects or objects that prevent changes.
  
  Solutions:
  
  Check Project Status: Review the status of the project. If it is completed or closed, you may need to reopen it or change its status to