How To Fix FKKBIX2012 - 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: 012

• 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
<DS:DE.BIT_DCPROCRULE_KK>processing rule</> &v4&.
The processing rule was specified in the <DS:DE.BIT_DCFUNCNAME_KK>
function module</> 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 FKKBIX2012 - Item for source trans. &1 is a duplicate according to check schema &2 ?

  The SAP error message FKKBIX2012 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 invoice verification or payment processing.
  Cause:
  The error occurs when the system detects that an item being processed (identified by the source transaction number) is already present in the document or transaction being validated. This can happen due to several reasons:
  
  Duplicate Entries: The same invoice or payment document has been entered multiple times.
  Incorrect Configuration: The check schema may be configured in a way that does not allow for certain duplicates, even if they are valid in other contexts.
  Data Entry Errors: Manual data entry mistakes can lead to the same item being entered more than once.
  
  Solution:
  To resolve the FKKBIX2012 error, you can take the following steps:
  
  
  Check for Duplicates:
  
  Review the transaction or document in question to see if the item has already been entered. You can do this by checking the relevant tables or using transaction codes like FB03 (Display Document) or FBL1N (Vendor Line Item Display).
  
  
  
  Review Check Schema:
  
  Analyze the check schema (&2) to understand the rules that are causing the duplicate check to fail. You may need to adjust the schema if it is too restrictive or not aligned with your business processes.
  
  
  
  Correct Data Entry:
  
  If you find that the item was entered in error, you can delete or correct the duplicate entry. Ensure that all relevant documents are accurate and do not contain duplicates.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for more details on the specific check schema and how it operates. This can provide insights into why the duplicate check is being triggered.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They can provide guidance based on the specific configuration and setup of your SAP system.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FB03, FBL1N, and others that can help you investigate the issue.
  SAP Notes: Check for any SAP Notes related to FKKBIX2012 for potential bug fixes or additional guidance.
  Configuration Settings: Review the configuration settings for the check schema in the SAP system, which can be found in the customizing settings (SPRO).
  
  By following these steps, you should be able to identify the cause of the FKKBIX2012 error and implement a solution to resolve it.