How To Fix EDEREG409 - Parameter &1 is not unique. Value &2 has already been defined

SAP Error Message - Details

• Message type: E = Error

• Message class: EDEREG - Messages for Deregulation Scenarios

• Message number: 409

• Message text: Parameter &1 is not unique. Value &2 has already been defined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message EDEREG409 - Parameter &1 is not unique. Value &2 has already been defined ?

  The SAP error message EDEREG409 indicates that there is a problem with the uniqueness of a parameter in the system. Specifically, it means that the parameter identified by &1 is not unique because the value &2 has already been defined for that parameter. This typically occurs in the context of configuration settings, where parameters must have unique values to avoid conflicts.
  Cause:
  
  Duplicate Entries: The most common cause of this error is that there are multiple entries for the same parameter with the same value in the configuration settings.
  Incorrect Configuration: It may also arise from incorrect or incomplete configuration settings where the same parameter is being defined multiple times.
  Data Migration Issues: If data has been migrated from another system, it may have introduced duplicates that were not present in the original system.
  
  Solution:
  
  Identify Duplicates: Check the configuration settings for the parameter &1 to identify where the duplicate value &2 is defined. You can do this by navigating to the relevant configuration transaction in SAP.
  Remove or Modify Duplicates: Once you have identified the duplicate entries, you can either remove the duplicate or modify one of the entries to ensure that each parameter has a unique value.
  Check Custom Code: If the error is occurring in a custom program or enhancement, review the code to ensure that it is not inadvertently creating duplicate entries.
  Consult Documentation: Refer to SAP documentation or notes related to the specific module or configuration you are working with to ensure that you are following best practices.
  Testing: After making changes, test the configuration to ensure that the error no longer occurs and that the system behaves as expected.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may need to use specific transaction codes (like SPRO for configuration) to access the relevant settings.
  SAP Notes: Check for any SAP Notes that might address this specific error or provide additional guidance on handling parameter uniqueness.
  Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for assistance.
  
  By following these steps, you should be able to resolve the EDEREG409 error and ensure that your parameters are configured correctly.