How To Fix FINS_RECON366 - Duplicate entry in table BSID_BCK: &1 message(s)

FINS_RECON366 - Overview

• Message type: E = Error

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

• Message number: 366

• Message text: Duplicate entry in table BSID_BCK: &1 message(s)

What causes this issue?

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

System Response

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

How to fix this error?

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

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_RECON366 - Duplicate entry in table BSID_BCK: &1 message(s) ?

  The SAP error message FINS_RECON366 indicates that there is a duplicate entry in the table BSID_BCK. This table is typically used for storing open item data for accounts receivable. The error suggests that there are multiple entries in this table that are causing a conflict, which can lead to issues in financial reporting and reconciliation processes.
  
  Cause:
  
  Data Migration Issues: If data was migrated from another system or during a system upgrade, duplicate entries may have been created.
  Incorrect Posting Logic: Custom programs or user errors during posting transactions can lead to duplicate entries.
  Concurrency Issues: If multiple users or processes are trying to post to the same account simultaneously, it may result in duplicates.
  System Bugs: Occasionally, bugs in the SAP system or specific configurations can lead to unexpected duplicate entries.
  
  
  Solution:
  
  
  Identify Duplicates: Use SQL queries or SAP transaction codes (like SE16 or SE11) to identify the duplicate entries in the BSID_BCK table. You can