How To Fix V1518 - For item &1, the following has already been invoiced: &2 &3

V1518 - Overview

• Message type: E = Error

• Message class: V1 - Verkaufsbelegbearbeitung

• Message number: 518

• Message text: For item &1, the following has already been invoiced: &2 &3

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message V1518 - For item &1, the following has already been invoiced: &2 &3 ?

  The SAP error message V1518 indicates that there is an issue with invoicing in the sales and distribution (SD) module. Specifically, the message states that for a particular item (denoted as &1), there has already been an invoice created for a certain quantity (denoted as &2) and possibly for a specific billing document (denoted as &3). This typically occurs when there is an attempt to invoice more than what has already been billed for that item.
  
  Cause:
  
  Duplicate Invoicing: The most common cause of this error is an attempt to create an invoice for a quantity that has already been fully invoiced.
  Incorrect Billing Document Reference: The system may be trying to reference a billing document that has already been processed.
  Sales Order Status: The sales order may have been partially delivered, and the system is preventing further invoicing for the already invoiced quantity.
  Billing Plan Issues: If there is a billing plan associated with