How To Fix FINS_RECON356 - &1: Duplicate entry in table BSID_BCK

SAP Error Message - Details

• Message type: E = Error

• Message class: FINS_RECON - SAP S/4HANA Finance Migration: Reconciliation

• Message number: 356

• Message text: &1: Duplicate entry in table BSID_BCK

What causes this issue?

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

System Response

How to fix this error?

Details about this issue (duplicate entry in index table) can be found
in the summary at the end of the application log (message number 366).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FINS_RECON356 - &1: Duplicate entry in table BSID_BCK ?

  The SAP error message FINS_RECON356 with the description "Duplicate entry in table BSID_BCK" typically indicates that there is a duplicate entry in the backup table for open items in accounts receivable (BSID_BCK). This can occur during processes such as reconciliation or when trying to post transactions that reference this table.
  Cause:
  
  Data Integrity Issues: The most common cause of this error is data integrity issues, where the same entry is mistakenly recorded more than once in the BSID_BCK table.
  System Errors: Sometimes, system errors or bugs during data migration or updates can lead to duplicate entries.
  Custom Developments: If there are custom programs or enhancements that manipulate financial data, they might inadvertently create duplicates.
  
  Solution:
  
  
  Identify Duplicates: Use SQL queries or SAP transaction codes (like SE16 or SE11) to check the BSID_BCK table for duplicate entries. You can run a query to find entries with the same key fields (like document number, company code, etc.).
  Example SQL query:
  SELECT * FROM BSID_BCK
  WHERE <key_field> = '<value>'
  
  
  Remove Duplicates: Once identified, you can either delete the duplicate entries or correct them based on your business rules. Be cautious with deletions; ensure you have backups and that you understand the implications of removing data.
  
  
  Check for Custom Code: Review any custom code or enhancements that might be affecting the posting of entries to ensure they are not causing duplicates.
  
  
  Run Consistency Checks: Use SAP standard tools like transaction SARA (Archive Administration) or SICF (Service Activation) to run consistency checks on your financial data.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide patches.
  
  
  Contact SAP Support: If the issue persists and you cannot resolve it, consider reaching out to SAP Support for assistance.
  
  
  Related Information:
  
  BSID_BCK Table: This is a backup table for open items in accounts receivable. Understanding its structure and the data it holds can help in troubleshooting.
  Transaction Codes: Familiarize yourself with transaction codes like FB03 (Display Document), FBL5N (Customer Line Item Display), and SE16 (Data Browser) for analyzing financial documents and entries.
  Data Migration: If this issue arose after a data migration, review the migration process to ensure that