How To Fix FIN_FB_RECON359 - Duplicate entry in table BSAK

SAP Error Message - Details

• Message type: E = Error

• Message class: FIN_FB_RECON - Conversion to S/4HANA: Reconciliation

• Message number: 359

• Message text: Duplicate entry in table BSAK

What causes this issue?

There are line items in table BSEG with duplicate entry in the index
table BSAK.

System Response

The system informs about this inconsistency which must be corrected in
your productive system before starting the data migration.

How to fix this error?

For more information, see
<DS:URLA.HTTPS://LAUNCHPAD.SUPPORT.SAP.COM/#/NOTES/2714344>SAP Note
2714344.</>

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FIN_FB_RECON359 - Duplicate entry in table BSAK ?

  The SAP error message FIN_FB_RECON359, which indicates a "Duplicate entry in table BSAK," typically arises during financial reconciliation processes, particularly when dealing with accounts payable or accounts receivable. The BSAK table in SAP contains cleared items for accounts payable and accounts receivable, and a duplicate entry suggests that there are multiple records in this table that should not exist.
  Cause:
  
  Data Entry Errors: Duplicate entries may occur due to manual data entry errors or incorrect postings.
  System Issues: Bugs or inconsistencies in the SAP system, especially after upgrades or migrations, can lead to duplicate records.
  Integration Issues: If there are integrations with other systems (like third-party applications), they might create duplicate entries if not properly managed.
  Batch Processing: If batch jobs are run multiple times without proper checks, they may create duplicates.
  
  Solution:
  
  
  Identify Duplicates: Use SQL queries or SAP transaction codes (like SE16 or SE11) to identify the duplicate entries in the BSAK table. You can look for entries with the same document number, company code, and fiscal year.
  Example SQL query:
  SELECT * FROM BSAK
  WHERE BELNR = 'your_document_number' AND BUKRS = 'your_company_code' AND GJAHR = 'your_fiscal_year';
  
  
  Delete or Correct Duplicates: Once identified, you can either delete the duplicate entries or correct them. Be cautious with deletions; ensure that you have backups and that the entries are indeed duplicates.
  
  
  Check Posting Logic: Review the posting logic in your financial processes to ensure that duplicates are not being created in the first place. This may involve checking user roles, authorization, and the processes that lead to posting.
  
  
  Run Reconciliation Programs: Use SAP reconciliation programs to clear out inconsistencies. Programs like F.13 (Automatic Clearing) can help in reconciling accounts and clearing duplicates.
  
  
  Consult SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide patches or updates that resolve underlying issues.
  
  
  Engage SAP Support: If the issue persists or if you are unsure about the steps to take, consider reaching out to SAP support for assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE16 (Data Browser), SE11 (Data Dictionary), and FBL1N (Vendor Line Item Display) to analyze the data.
  Backup: Always ensure that you have a backup of your data before making any deletions or significant changes.
  Documentation: Keep documentation of any changes made for future reference and compliance.
  
  By following these steps, you should be able to resolve the FIN_FB_RECON359 error and prevent it from occurring in the future.