How To Fix CN789 - A project version with key & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 789

• Message text: A project version with key & already exists

What causes this issue?

A project version with the key "&V1&" has already been created for the
network. You cannot use this key anymore.

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

System Response

INCLUDE 'NA_ALLG_NOFUNKTION' OBJECT DOKU ID TX

How to fix this error?

Use a different key for the project version.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN789 - A project version with key & already exists ?

  The SAP error message CN789 indicates that you are trying to create a project version with a key that already exists in the system. This typically occurs in the context of project management within SAP, particularly when dealing with project structures and versions.
  Cause:
  The error occurs when:
  
  You attempt to create a new project version using a key (or identifier) that is already assigned to an existing project version.
  There may be a duplicate entry in the database for the project version you are trying to create.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Project Versions:
  
  Use transaction codes like CJ20N (Project Builder) or CJ03 (Display Project) to check if a project version with the same key already exists.
  If it does exist, you may need to use that existing version instead of creating a new one.
  
  
  
  Use a Different Key:
  
  If you need to create a new project version, consider using a different key that does not conflict with existing entries.
  
  
  
  Delete or Archive Old Versions:
  
  If the existing project version is no longer needed, you may consider deleting or archiving it, provided that this action complies with your organization's data management policies.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for specific guidelines on managing project versions and keys.
  
  
  
  Check Authorizations:
  
  Ensure that you have the necessary authorizations to create or modify project versions. Lack of proper permissions can sometimes lead to unexpected errors.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting SAP Notes for any known issues related to this error.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N, CJ02 (Change Project), and CJ03 (Display Project).
  Project Management in SAP: Understanding the project management module in SAP can help you navigate and manage project versions more effectively.
  SAP Notes: Check SAP Notes for any updates or patches that may address this issue.
  
  By following these steps, you should be able to resolve the CN789 error and manage your project versions effectively.