How To Fix CN891 - Due to existing assignments milestone & & cannot be deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 891

• Message text: Due to existing assignments milestone & & cannot be deleted

What causes this issue?

The milestone cannot be deleted because it is linked with a billing
plan.

System Response

INCLUDE NA_ALLG_NOVERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

Delete the link between the milestone and the billing plan. To do so,
delete the milestone dates.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN891 - Due to existing assignments milestone & & cannot be deleted ?

  The SAP error message CN891 indicates that there are existing assignments related to a milestone in a project, which prevents the deletion of that milestone. This typically occurs in the context of project management within SAP, particularly when dealing with project structures and milestones in the Project System (PS) module.
  
  Cause:
  The error occurs because:
  
  Existing Dependencies: The milestone you are trying to delete has dependencies or assignments that are still active. This could include tasks, activities, or other project elements that are linked to the milestone.
  Status of the Milestone: The milestone may be in a status that does not allow for deletion, such as being part of a closed project or having been used in reporting.
  Data Integrity: SAP enforces data integrity rules to ensure that deleting a milestone does not lead to inconsistencies in project data.
  
  
  Solution:
  To resolve the CN891 error, you can take the following steps:
  
  
  Check Assignments: 
  
  Review the assignments related to