How To Fix FKKBIX2029 - Consumption item &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: 029

• Message text: Consumption item &1 is a duplicate according to check schema &2

What causes this issue?

For the consumption item being transferred of business partner &v3& with
ID &v1&, there is an additional item being transferred, which, according
to the <DS:DE.CIT_DCFIELD_KK>comparison fields</> entered in
<DS:DE.CIT_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.CIT_DCPROCRULE_KK>processing rule</> &v4&.
The processing rule was specified in the <DS:DE.CIT_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 FKKBIX2029 - Consumption item &1 is a duplicate according to check schema &2 ?

  The SAP error message FKKBIX2029 indicates that there is a duplicate consumption item in the context of a check schema during the processing of a financial transaction, typically related to the posting of consumption items in the SAP system. This error often arises in the context of the SAP Flexible Real Estate Management (RE-FX) module or similar financial applications.
  
  Cause:
  The error occurs when the system detects that a consumption item (e.g., a rental or service charge) has been entered more than once for the same period or transaction, violating the uniqueness constraints defined in the check schema. This can happen due to:
  
  Duplicate Entries: The user may have inadvertently entered the same consumption item multiple times.
  Data Migration Issues: If data was migrated from another system, duplicates may have been introduced.
  
  Configuration Issues: The check schema may be configured in a way that does not allow for certain types of duplicates, leading to this