How To Fix COM_DIFF_KEY013 - Field name & exists more than once in the external key fields

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_DIFF_KEY - Messages for Differentiation Key

• Message number: 013

• Message text: Field name & exists more than once in the external key fields

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message COM_DIFF_KEY013 - Field name & exists more than once in the external key fields ?

  The SAP error message COM_DIFF_KEY013 indicates that there is a problem with the external key fields in a configuration or data entry process. Specifically, it means that a field name is duplicated in the external key fields, which is not allowed. This can occur in various contexts, such as when working with master data, configuration settings, or during data uploads.
  Cause:
  The error is typically caused by one of the following:
  
  Duplicate Field Names: The same field name is defined more than once in the external key fields of a configuration or data structure.
  Incorrect Data Mapping: When mapping data from an external source, the mapping may inadvertently include the same field multiple times.
  Configuration Issues: In some cases, the configuration of the data model or the structure of the external key fields may not be set up correctly.
  
  Solution:
  To resolve the COM_DIFF_KEY013 error, you can take the following steps:
  
  
  Check External Key Fields:
  
  Review the configuration or data entry where the error occurred.
  Identify the external key fields and check for any duplicates.
  
  
  
  Remove Duplicates:
  
  If you find duplicate field names, remove or rename them to ensure that each field name is unique.
  
  
  
  Review Data Mapping:
  
  If the error occurred during a data upload or mapping process, check the mapping configuration to ensure that each field is only mapped once.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for guidance on configuring external key fields correctly.
  
  
  
  Test Changes:
  
  After making the necessary adjustments, test the changes to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific notes related to this error message, as they may provide additional context or solutions.
  Transaction Codes: Depending on where the error occurs, you may need to use specific transaction codes (e.g., SE11 for data dictionary, SE80 for object navigator) to investigate the data structure.
  Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the COM_DIFF_KEY013 error in your SAP system.