How To Fix FKKINV120 - Billing document &1 (source document category &2) already invoiced

FKKINV120 - Overview

• Message type: E = Error

• Message class: FKKINV - Invoicing in Contract Accounts Receivable and Payable

• Message number: 120

• Message text: Billing document &1 (source document category &2) already invoiced

trados = fi

What causes this issue?

The source document specified is to be invoiced. According to the
invoicing history, this document has already been invoiced with
invoicing document number &V3&.

System Response

Processing cannot be continued.
This is a possibly a data inconsistency. There may only be an invoicing
order for a source document if this document is not included in any
unreversed invoicing.

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.

FKKINV120 - Details

• The SAP error message FKKINV120 indicates that a billing document has already been invoiced, which means that the system has detected an attempt to invoice a document that has already been processed. This error typically occurs in the context of contract accounts receivable and payable (FI-CA) when trying to create a new invoice for a document that has already been invoiced.
  
  Cause:
  
  Duplicate Invoicing Attempt: The most common cause is that there is an attempt to create an invoice for a billing document that has already been invoiced.
  Incorrect Document Flow: There may be an issue with the document flow where the system does not recognize that the document has already been processed.
  Manual Entry Errors: Users may inadvertently try to invoice the same document multiple times due to manual errors or misunderstanding of the process.
  
  
  Solution:
  
  Check Document Status: Verify the status of the billing document in question. You can do this by checking the