How To Fix FKKEXC021 - Grouping key &3 of branch/cash desk &2/&1 amount/crcy &4 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: FKKEXC - Message Class for External Payments

• Message number: 021

• Message text: Grouping key &3 of branch/cash desk &2/&1 amount/crcy &4 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKKEXC021 - Grouping key &3 of branch/cash desk &2/&1 amount/crcy &4 already exists ?

  The SAP error message FKKEXC021 indicates that there is a duplicate grouping key for a specific branch or cash desk in the context of financial transactions. This error typically arises in the SAP Convergent Charging or Contract Accounts Receivable and Payable (FI-CA) modules when trying to post a transaction that conflicts with an existing entry.
  Cause:
  The error occurs when:
  
  You are trying to create or post a transaction that has the same grouping key as an existing transaction for the specified branch and cash desk.
  The grouping key is a combination of various fields (like amount, currency, and other identifiers) that must be unique for each transaction in the specified context.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Transactions: 
  
  Review the existing transactions for the specified branch and cash desk to identify the conflicting grouping key. You can do this by querying the relevant tables in SAP (e.g., using transaction codes like FBL5N for customer line items).
  
  
  
  Modify the Transaction:
  
  If you find that the transaction you are trying to post is indeed a duplicate, you may need to modify the amount, currency, or other relevant fields to ensure that the grouping key is unique.
  
  
  
  Delete or Adjust Existing Entries:
  
  If the existing entry is incorrect or no longer needed, consider deleting or adjusting it to allow for the new transaction to be posted.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help notes related to the specific module you are working with for additional insights on handling grouping keys.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support for assistance, especially if this is a recurring issue or if you suspect a system bug.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FBL5N (Customer Line Items), FBL1N (Vendor Line Items), and others that may help you analyze the data.
  SAP Notes: Check for any SAP Notes that might address this specific error or provide additional context on handling grouping keys.
  Configuration Settings: Review the configuration settings in the FI-CA module to ensure that the grouping key logic aligns with your business processes.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.