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 there is an existing inventory document for the same material and movement type.
  Review Open Documents: Ensure that there are no open or incomplete documents that could be causing the conflict. If necessary, complete or reverse those documents.
  Adjust Configuration: If the issue persists, review the configuration settings related to inventory management to ensure they are set up correctly.
  Consult with SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for further assistance, especially if this is a recurring problem.
  Transaction Logs: Check transaction logs for any errors or warnings that might provide additional context on why the duplicate is being flagged.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB1A (Goods Withdrawal), MB1B (Transfer Posting), and MB1C (Other Goods Receipts) to understand where the issue might be occurring.
  SAP Notes: Look for SAP Notes related to error M8804 in the SAP Support Portal, as there may be specific patches or updates that address this issue.
  User Documentation: Review SAP documentation or user manuals for inventory management to understand the processes and configurations better.
  
  By following these steps, you should be able to identify the cause of the M8804 error and take appropriate action to resolve it.