How To Fix CP129 - Key date & will be overwritten by date in change number.

SAP Error Message - Details

• Message type: E = Error

• Message class: CP - Task list messages: Core data

• Message number: 129

• Message text: Key date & will be overwritten by date in change number.

What causes this issue?

You are attempting to create, change or display a rate routing or a
reference rate routing with a change number.
The default value for the key date is today's date. This default will
be overwritten by the date in the change number when you enter a change
number.

System Response

When you create rate routings or reference rate routings, the system
writes new data records with this date.
When you change rate routings or reference rate routings with history,
the changes are valid as of this date.
Only rate routings and reference rate routings that are valid as of
this key date are selected.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CP129 - Key date & will be overwritten by date in change number. ?

  The SAP error message CP129 indicates that there is a conflict between the key date you are trying to use in a change number and the date that is already set in the change number. This typically occurs in the context of change management in SAP, particularly when dealing with production planning and control (PP) or project systems (PS).
  Cause:
  The error occurs when:
  
  You are trying to assign a key date to a change number that is already associated with a different date.
  The key date you are trying to use is not compatible with the existing data in the change number.
  There may be a mismatch in the dates due to changes made in the system or incorrect data entry.
  
  Solution:
  To resolve the CP129 error, you can take the following steps:
  
  
  Check the Change Number: Review the change number you are working with to see what key date is currently assigned. You can do this by navigating to the change number in the relevant transaction (e.g., transaction code CC02 for changing change numbers).
  
  
  Verify Key Dates: Ensure that the key date you are trying to assign is appropriate and does not conflict with existing dates. If necessary, adjust the key date to match the requirements of the change number.
  
  
  Modify the Change Number: If the change number is not yet finalized, you may be able to modify it to accommodate the new key date. If it is finalized, you may need to create a new change number.
  
  
  Consult Documentation: Review any relevant documentation or guidelines for managing change numbers in your organization to ensure compliance with processes.
  
  
  Check Authorizations: Ensure that you have the necessary authorizations to make changes to the change number and its associated key dates.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who can provide further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CC01 (Create Change Number), CC02 (Change Change Number), and CC03 (Display Change Number).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP Help documentation for change management processes to understand how key dates and change numbers interact.
  
  By following these steps, you should be able to address the CP129 error and proceed with your change management tasks in SAP.