How To Fix FIN_FB_RECON354 - Duplicate entry in table BSIS

FIN_FB_RECON354 - Overview

• Message type: E = Error

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

• Message number: 354

• Message text: Duplicate entry in table BSIS

What causes this issue?

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

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_RECON354 - Duplicate entry in table BSIS ?

  The SAP error message FIN_FB_RECON354, which indicates a "Duplicate entry in table BSIS," typically arises during financial postings or reconciliations. The BSIS table is used to store line items for accounts in the General Ledger, and a duplicate entry suggests that there is an attempt to post a transaction that already exists in this table.
  Causes:
  
  Duplicate Posting: The most common cause is that a transaction has been posted more than once, either manually or through an automated process.
  Data Migration Issues: If data has been migrated from another system, there may be duplicates due to improper data cleansing or transformation.
  Incorrect Configuration: Configuration settings in the system may allow for duplicate entries under certain conditions.
  User Error: Users may inadvertently attempt to post the same transaction multiple times.
  
  Solutions:
  
  
  Identify Duplicate Entries:
  
  Use transaction codes like SE16 or SE11 to access the BSIS table and identify the duplicate entries. You can filter by document number, company code,