How To Fix CN136 - Specified assignment to WBS element already exists

CN136 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 136

• Message text: Specified assignment to WBS element already exists

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.

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CN136 - Details

• The SAP error message CN136 ("Specified assignment to WBS element already exists") typically occurs when you attempt to assign a cost element, activity, or other resource to a Work Breakdown Structure (WBS) element that already has an existing assignment for that specific resource or cost element. This is a common issue in project management within SAP, particularly when dealing with project planning and budgeting.
  
  Cause:
  
  Duplicate Assignment: The most common cause is that the resource or cost element you are trying to assign to the WBS element has already been assigned.
  Incorrect Data Entry: There may be a mistake in the data entry, such as trying to assign the same cost element or activity multiple times.
  Project Structure: The project structure may not allow for multiple assignments of the same resource to a single WBS element.
  
  
  Solution:
  
  Check Existing Assignments: Review the existing assignments for the WBS element to confirm if the resource or cost element