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

CN789 - Overview

• 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.

CN789 - Details

• 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