How To Fix FKK_EBS015 - Invoice number &1 is not unique; more than 1 document found

SAP Error Message - Details

• Message type: E = Error

• Message class: FKK_EBS - Interface between FI-CA and External Billing System

• Message number: 015

• Message text: Invoice number &1 is not unique; more than 1 document found

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKK_EBS015 - Invoice number &1 is not unique; more than 1 document found ?

  The SAP error message FKK_EBS015 indicates that there is an issue with the uniqueness of an invoice number in the system. Specifically, it means that when the system attempted to process an invoice, it found multiple documents associated with the same invoice number, which is not allowed.
  Cause:
  
  Duplicate Invoice Numbers: The most common cause is that the same invoice number has been used for more than one document in the system. This can happen due to data entry errors, system integration issues, or incorrect processing of invoices.
  Incorrect Configuration: There may be issues with the configuration of the invoice processing settings, leading to the system not recognizing the uniqueness of invoice numbers.
  Data Migration Issues: If data has been migrated from another system, duplicate invoice numbers may have been introduced during the migration process.
  
  Solution:
  
  Identify Duplicates: Use transaction codes like SE16 or SE11 to query the relevant tables (e.g., FKKINV, BKPF) to find all documents associated with the invoice number in question. This will help you identify the duplicates.
  Correct the Data: Once duplicates are identified, you can either:
  
  Delete the duplicate entries if they are erroneous.
  Modify the invoice numbers to ensure uniqueness.
  
  
  Review Configuration: Check the configuration settings related to invoice processing to ensure that they are set up correctly to prevent duplicates.
  Data Cleansing: If the issue is due to data migration, consider performing a data cleansing exercise to remove or correct duplicate entries.
  Consult Documentation: Review SAP documentation or consult with your SAP support team for specific guidelines on handling this error in your version of SAP.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like FBL1N (Vendor Line Item Display), FBL3N (G/L Account Line Item Display), and FBL5N (Customer Line Item Display) to analyze related documents.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to view and modify the relevant documents in the system.
  Testing: After making corrections, test the invoice processing again to ensure that the issue has been resolved.
  
  If the problem persists after following these steps, it may be beneficial to engage with SAP support or your internal IT team for further assistance.