How To Fix VL321 - Item category & is not allowed

VL321 - Overview

• Message type: E = Error

• Message class: VL -

• Message number: 321

• Message text: Item category & is not allowed

What causes this issue?

According to the item category determination entries (table T184L),
item category &V1& is not allowed.
INCLUDE 'NA_NO_PROCESSING_1' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

Select an item category that you are allowed to enter manually.

Error message extract from SAP system. Copyright SAP SE.

VL321 - Details

• The SAP error message VL321 ("Item category & is not allowed") typically occurs during the processing of sales orders, deliveries, or other logistics-related transactions. This error indicates that the item category specified in the transaction is not permitted for the operation being performed. Here are some common causes, solutions, and related information for this error:
  Causes:
  
  Incorrect Item Category: The item category assigned to the material may not be valid for the type of transaction you are trying to execute (e.g., delivery, sales order).
  
  Configuration Issues: The item category may not be configured correctly in the system, or it may not be allowed for the specific sales document type or delivery type.
  Material Master Settings: The material master record may not be set up correctly, leading to the use of an inappropriate item category.
  Sales Document Type Restrictions: Certain sales document types may have restrictions on which item categories can be used.
  Customizations: Custom developments or