How To Fix CK304 - Costing variants &1 and &2 have the same val. variant and costing type

CK304 - Overview

• Message type: E = Error

• Message class: CK - Product Costing Messages

• Message number: 304

• Message text: Costing variants &1 and &2 have the same val. variant and costing type

What causes this issue?

You are costing material &v3& in plant &v4& with costing variant &v1&.
The system has determined that there is already a cost estimate for
this material with costing variant &v2&.
The problem is that the two costing variants have the same key (the
same combination of valuation variant and costing type). This means
that the results of cost estimates that use these costing variants will
overwrite each other.

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?

If you do not want this to happen, you can go into Customizing for
Product Cost Controlling and reset the <LS>Saving allowed</> indicator
in one of these costing variants.
You could also delete one of the costing variants. However, to do this
you must first delete all the cost estimates (in Reorganization) that
were created with that costing variant.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CK304 - Costing variants &1 and &2 have the same val. variant and costing type ?

  The SAP error message CK304 indicates that there is a conflict between two costing variants in the system. Specifically, it means that the two costing variants you are trying to use have the same valuation variant and costing type, which is not allowed in SAP.
  
  Cause:
  
  Duplicate Configuration: The error typically arises when two costing variants are configured with identical valuation variants and costing types. This can happen if the configuration was not done carefully or if there was an attempt to copy an existing costing variant without changing its parameters.
  Incorrect Assignment: It may also occur if the costing variants are incorrectly assigned to the same cost object or if there is a misconfiguration in the costing setup.
  
  
  Solution:
  To resolve the CK304 error, you can take the following steps:
  
  
  Check Costing Variants:
  
  Go to the configuration of costing variants in SAP (Transaction code: OKKN).
  Identify the costing variants mentioned in the error message (&1 and &2).
  Review