How To Fix M8804 - Inv. not automatically created, potential duplicate exists (acc doc & &)

SAP Error Message - Details

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 804

• Message text: Inv. not automatically created, potential duplicate exists (acc doc & &)

What causes this issue?

The system has performed a check that prevents the creation of duplicate
invoices for invoices that are created automatically, for example using
BAPIs or SOA services.
The system has just tried to create an invoice which contains data that
is identical with data in the existing accounting document &V1& &V2&.
The following data is identical in both documents:
Company code
Document date
Reference
Currency
Supplier
Amount

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Compare the current invoice with the accounting document &V1& &V2&.

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 M8804 - Inv. not automatically created, potential duplicate exists (acc doc & &) ?

  The SAP error message M8804 indicates that an inventory document could not be automatically created because a potential duplicate exists. This typically occurs during inventory management processes, such as goods movements or inventory adjustments, where the system detects that an inventory document with similar characteristics already exists.
  
  Cause:
  
  Duplicate Document: The most common cause is that there is already an existing inventory document for the same material, plant, and movement type that has not been fully processed or is still open.
  Timing Issues: If multiple transactions are being processed simultaneously, it may lead to conflicts where the system identifies potential duplicates.
  
  Configuration Issues: There may be settings in the system that are causing it to incorrectly identify duplicates.
  User Error: Manual entries or incorrect data input can lead to situations where the system thinks a duplicate exists.
  
  
  Solution:
  
  Check Existing Documents: Use transaction codes like MB03 (Display Material Document) or MB51 (Material Document List) to check if