How To Fix FKKBIX2010 - 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: 010

• 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&, an unreversed <DS:TX.FKKBIX_BIT>billable item</>
already exists, 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 with the item being transferred.
In addition, the check period for the item being transferred has
expired.

System Response

The treatment of the item is in accordance with the setting for the
<DS:DE.BIT_DCOUTDATRULE_KK>processing rule after expiration of the check
period</>.

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 FKKBIX2010 - Item for source trans. &1 is a duplicate according to check schema &2 ?

  The SAP error message FKKBIX2010 indicates that there is a duplicate item in the context of a specific transaction, as determined by the check schema. This error typically occurs during the processing of financial documents, such as invoices or payments, where the system checks for duplicate entries based on predefined criteria.
  
  Cause:
  The error is triggered when the system identifies that an item being processed (source transaction) is already present in the system according to the rules defined in the check schema. This can happen due to:
  
  Duplicate entries being entered manually.
  Data being imported from external systems that contain duplicates.
  Incorrect configuration of the check schema that does not properly account for unique identifiers.
  
  
  Solution:
  To resolve the FKKBIX2010 error, you can take the following steps:
  
  
  Identify the Duplicate Entry:
  
  Check the transaction number (&1) mentioned in the error message.
  Use transaction codes like FB03 (Display Document) or FBL1N (Vendor Line Item Display) to find the existing entry that