How To Fix OMW207 - Duplicate valuation class not allowed.

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message OMW207 - Duplicate valuation class not allowed. ?

  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 is already in use by another material.
  Use transaction code MM03 to display the material master and check the valuation class.
  
  
  
  Change Valuation Class:
  
  If the valuation class is indeed in use, consider using a different valuation class that is not already assigned to another material.
  You can change the valuation class in the material master using transaction code MM02.
  
  
  
  Review Configuration:
  
  Check the configuration settings for valuation classes in the SAP system. This can be done through transaction code SPRO and navigating to:
  
  Logistics > Material Master > Valuation > Define Valuation Classes.
  
  
  Ensure that the valuation classes are correctly defined and that there are no conflicts.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for any specific guidelines related to valuation classes and material types.
  
  
  
  Check Material Type Settings:
  
  Ensure that the material type you are working with allows for the valuation class you are trying to assign. This can also be checked in the configuration settings.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot find a resolution, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Valuation Class: A valuation class is used in SAP to determine how the system values materials in inventory and accounting. It is linked to the general ledger accounts for inventory valuation.
  Material Master: The material master is a central repository of information about materials in SAP, including data related to purchasing, inventory management, and accounting.
  Transaction Codes:
  
  MM01: Create Material
  MM02: Change Material
  MM03: Display Material
  SPRO: Access the SAP Customizing Implementation Guide
  
  
  
  By following these steps, you should be able to resolve the OMW207 error and successfully manage your material master records.