How To Fix M8596 - Logistics invoice document & / & already exists

M8596 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 596

• Message text: Logistics invoice document & / & already exists

What causes this issue?

An invoice document has already been saved under the number entered.

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?

Save the document a second time. If this message reappears, enter the
document again.

Error message extract from SAP system. Copyright SAP SE.

M8596 - Details

• The SAP error message M8596, which states "Logistics invoice document & / & already exists," typically occurs when there is an attempt to create or process a logistics invoice document that already exists in the system. This can happen in various scenarios, such as during invoice verification or when trying to post an invoice that has already been processed.
  
  Cause:
  
  Duplicate Invoice Entry: The most common cause is that the invoice has already been entered into the system, either manually or through an automated process.
  Incorrect Document Number: The document number being used may not be unique or may have been reused incorrectly.
  System Errors: Sometimes, system glitches or errors during data entry can lead to duplicate entries being created.
  
  
  Solution:
  
  Check Existing Invoices: Verify if the invoice document already exists in the system. You can do this by searching for the invoice number in the relevant transaction (e.g., MIRO for invoice verification).
  Use the Correct Document