How To Fix CN640 - The assignment exists already

CN640 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 640

• Message text: The assignment exists already

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

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CN640 - Details

• The SAP error message CN640 ("The assignment exists already") typically occurs in the context of project management or cost center assignments in SAP. This error indicates that there is an attempt to create a duplicate assignment for a project, cost center, or internal order that already exists in the system.
  
  Cause:
  
  Duplicate Assignment: The most common cause is that the system is trying to assign a resource, cost center, or project to another entity (like a network or activity) that has already been assigned.
  Incorrect Data Entry: There may be a mistake in the data entry where the same assignment is being entered multiple times.
  System Configuration: Sometimes, the configuration settings in the project system or controlling area may lead to this error if they do not allow for multiple assignments.
  
  
  Solution:
  
  Check Existing Assignments: Review the existing assignments for the project, cost center, or internal order to confirm if the assignment already exists. You can