How To Fix FKKBIX2008 - Item for source trans. &1 is a duplicate according to check schema &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FKKBIX2 - Billing in Contract Accounts Receivable and Payable

• Message number: 008

• Message text: Item for source trans. &1 is a duplicate according to check schema &2

What causes this issue?

For the item being transferred of business partner &v3& with source
transaction &v1&, there is an additional item being transferred, which,
according to the <DS:DE.BIT_DCFIELD_KK>comparison fields</> entered in
<DS:DE.BIT_DCSCHEMA_KK>check schema</> &v2& for the duplicate check, is
identical.

System Response

The treatment of the item being transferred is based on the
<DS:DE.BIT_DCPROCRULE_KK>processing rule</> entered in schema &v2&.

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 FKKBIX2008 - Item for source trans. &1 is a duplicate according to check schema &2 ?

  The SAP error message FKKBIX2008 indicates that there is a duplicate item in the context of a source transaction, which is being checked against a specified check schema. This error typically arises during the processing of financial documents, particularly in the context of accounts payable or accounts receivable.
  Cause:
  The error occurs when the system detects that an item being processed (identified by the source transaction number) is already present in the system according to the rules defined in the check schema. This can happen due to several reasons:
  
  Duplicate Entries: The same transaction or item has been entered multiple times.
  Incorrect Configuration: The check schema may be configured in a way that does not allow for certain types of duplicates, even if they are valid in other contexts.
  Data Migration Issues: If data has been migrated from another system, duplicates may have been inadvertently created.
  User Error: Manual entry errors can lead to duplicate transactions being created.
  
  Solution:
  To resolve the FKKBIX2008 error, you can take the following steps:
  
  
  Identify Duplicates: Check the database or transaction logs to identify the duplicate entries. You can use transaction codes like SE16 or SE11 to query the relevant tables (e.g., BKPF, BSEG) for the source transaction number.
  
  
  Review Check Schema: Examine the check schema (&2) to understand the rules that are causing the duplication error. You may need to adjust the schema if it is too restrictive or not aligned with your business processes.
  
  
  Delete or Adjust Duplicates: If duplicates are found, determine whether they should be deleted or adjusted. Ensure that any changes comply with your organization's data integrity policies.
  
  
  Consult Documentation: Review SAP documentation or notes related to the FKKBIX2008 error for any specific guidance or patches that may address the issue.
  
  
  Test Changes: After making adjustments, test the changes in a development or quality assurance environment before applying them to production.
  
  
  User Training: If user error is a frequent cause, consider providing additional training to users on how to enter transactions correctly to avoid duplicates.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FB60 (Enter Incoming Invoice), FB70 (Enter Outgoing Invoice), and FBL1N (Vendor Line Item Display) to manage financial documents.
  SAP Notes: Check SAP Notes for any known issues or patches related to FKKBIX2008.
  Support: If the issue persists, consider reaching out to SAP support for further assistance.
  
  By following these steps, you should be able to identify the cause of the FKKBIX2008 error and implement a solution to resolve it.