How To Fix KPN054 - A costing for material &2 has already been maintained re WBS el. &1

SAP Error Message - Details

• Message type: E = Error

• Message class: KPN - Costing: Networks, Projects

• Message number: 054

• Message text: A costing for material &2 has already been maintained re WBS el. &1

What causes this issue?

The materials in valuated project stock are valued at the level of the
WBS element, material, and plant.
A price has already been prescribed for WBS element &V1&, material &V2&
, and plant &V3& by means of a unit costing.

System Response

You cannot create a further unit costing for WBS element &V1&, material
&V2&, plant &V3&.

How to fix this error?

Adjust the existing unit costing as necessary.

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 KPN054 - A costing for material &2 has already been maintained re WBS el. &1 ?

  The SAP error message KPN054 indicates that a costing for a specific material (denoted by &2) has already been maintained for a Work Breakdown Structure (WBS) element (denoted by &1). This typically occurs in the context of project controlling and cost planning within SAP.
  Cause:
  
  Duplicate Costing Entry: The error arises when there is an attempt to create or modify a costing entry for a material that already has an existing costing entry associated with the specified WBS element.
  Incorrect Data Entry: It may also occur due to incorrect data entry or an attempt to reassign costs to a WBS element that already has costs assigned.
  System Configuration: Sometimes, the system configuration or settings may lead to this error if the same material is being used across multiple projects or WBS elements.
  
  Solution:
  
  Check Existing Costing Entries: Review the existing costing entries for the specified material and WBS element. You can do this by navigating to the relevant transaction codes (e.g., CJI3 for project reports) to see the current cost assignments.
  Modify or Delete Existing Entry: If you need to change the costing, you may need to delete the existing entry or modify it as per your requirements. Ensure that you have the necessary authorizations to make these changes.
  Use Different WBS Element: If the costing needs to be maintained for a different WBS element, ensure that you are using the correct WBS element that does not have existing cost assignments for the material.
  Consult Documentation: Refer to SAP documentation or your organization's guidelines on project costing to ensure compliance with internal processes.
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to your SAP support team or consulting SAP notes for any known issues related to this error.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), CJI3 (Project Actual Line Items), and KSB1 (Cost Centers: Actual Line Items) to analyze costs.
  Costing Variants: Understand the costing variants and how they are configured in your SAP system, as this can affect how costs are assigned and reported.
  User Authorizations: Ensure that you have the necessary authorizations to view and modify costing entries in the system.
  
  By following these steps, you should be able to resolve the KPN054 error and maintain the necessary costing for your materials and WBS elements.