How To Fix V1321 - Item category &1 is not defined for item &2

V1321 - Overview

• Message type: E = Error

• Message class: V1 - Verkaufsbelegbearbeitung

• Message number: 321

• Message text: Item category &1 is not defined for item &2

What causes this issue?

This <GL:item_category>item category</> &V1& is not allowed for this
item.
INCLUDE 'NA_NO_PROCESSING_1' OBJECT DOKU ID TX LANGUAGE E
INCLUDE 'NA_CHECK_ENTRY' OBJECT DOKU ID TX LANGUAGE E
DEFINE &FELDNAME& = '<LS>Item category</>'
INCLUDE 'NA_POSSIBLE_ENTRY' OBJECT DOKU ID TX LANGUAGE E

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message V1321 - Item category &1 is not defined for item &2 ?

  The SAP error message V1321, which states "Item category &1 is not defined for item &2," typically occurs in the context of sales document processing, such as sales orders or quotations. This error indicates that the system cannot find a valid item category for the specified item in the sales document.
  
  Cause:
  
  Missing Item Category Definition: The item category specified in the error message is not defined in the system for the relevant sales document type.
  Incorrect Configuration: The configuration settings for item categories may not be set up correctly in the sales document type or may not be assigned to the relevant sales organization or distribution channel.
  Master Data Issues: The material master or customer master data may not be set up correctly, leading to the system not being able to determine the appropriate item category.
  Sales Document Type: The sales document type being used may not be compatible with the item category being