How To Fix 26002 - Document already exists

26002 - Overview

• Message type: E = Error

• Message class: 26 - Dokumentenverwaltung

• Message number: 002

• Message text: Document already exists

What causes this issue?

You want to create a document.
A document already exists with the data you entered for document
number, document type, document part and document version.

How to fix this error?

Check your entries.
If your entries are correct, display the document so that you can check
the data.
You may want to create a new version.
To do this, choose <ZH>Document -> New version</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 26002 - Document already exists ?

  The SAP error message 26002, which states "Document already exists," typically occurs when you attempt to create a document (such as a purchase order, invoice, or other transactional document) that has a unique identifier (like a document number) that already exists in the system. This can happen in various SAP modules, including MM (Materials Management), SD (Sales and Distribution), and FI (Financial Accounting).
  Causes:
  
  Duplicate Document Number: The most common cause is that the document number you are trying to use is already assigned to another document in the system.
  Incorrect Document Type: You may be using the wrong document type that has a different number range or is not allowed for the transaction you are trying to perform.
  System Configuration: The number range configuration for the document type may not be set up correctly, leading to conflicts.
  User Error: The user may have inadvertently tried to create a document with the same number as