How To Fix OMW207 - Duplicate valuation class not allowed.

OMW207 - Overview

• Message type: E = Error

• Message class: OMW - MB0D

• Message number: 207

• Message text: Duplicate valuation class not allowed.

What causes this issue?

A valuation class cann only appear for one material type.

System Response

You cannot continue until you have changed the valuation class.

How to fix this error?

Change the valuation class name to a unique name.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

OMW207 - Details

• The SAP error message OMW207 "Duplicate valuation class not allowed" typically occurs when there is an attempt to create or modify a material master record with a valuation class that has already been assigned to another material in a way that violates the system's constraints. This error is often related to the configuration of the material master and the valuation classes used in the system.
  
  Cause:
  
  Duplicate Valuation Class: The valuation class you are trying to assign to a material is already assigned to another material in a way that is not allowed by the system configuration.
  
  Configuration Issues: There may be issues in the configuration of the valuation classes in the system, leading to conflicts.
  Material Type Restrictions: Certain material types may have restrictions on the valuation classes that can be assigned to them.
  
  
  Solution:
  
  
  Check Existing Valuation Classes:
  
  Go to the material master records and check if the valuation class you are trying to assign