How To Fix MW451 - Reference to a contract not possible for item category &1

MW451 - Overview

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 451

• Message text: Reference to a contract not possible for item category &1

What causes this issue?

Allocation table items can only be created referencing a contract if
goods are to be delivered direct to a store or a DC.

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?

Select the corresponsing allocation table type or item category.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

MW451 - Details

• The SAP error message MW451, which states "Reference to a contract not possible for item category &1," typically occurs when there is an issue with the item category in a purchase order or contract that is trying to reference a contract. This error can arise in various scenarios, particularly when dealing with purchasing documents.
  Causes:
  
  
  Incompatible Item Category: The item category specified in the purchase order or contract does not allow for referencing a contract. Certain item categories are designed for specific types of transactions and may not support contract references.
  
  
  Contract Type: The contract type being referenced may not be compatible with the item category of the purchase order. For example, a service contract may not be compatible with a material item category.
  
  
  
  Configuration Issues: The configuration settings in the SAP system for item categories and contract types may not be set up correctly, leading to incompatibility.
  
  
  Missing Master Data: The material or service