How To Fix KG1173 - Assignment can only be made once

SAP Error Message - Details

• Message type: E = Error

• Message class: KG1 - CO-PA planning

• Message number: 173

• Message text: Assignment can only be made once

What causes this issue?

You tried to assign characteristic value "&V1&" for characteristic "
&V2&" to another characteristic value more than once. This action is
not supported for the current planning method.

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?

Only assign a characteristic value once. If you want to assign a
characteristic value more than once, you need to define more parameter
sets.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KG1173 - Assignment can only be made once ?

  The SAP error message KG1173 ("Assignment can only be made once") typically occurs in the context of controlling (CO) when you are trying to assign a cost object (like a cost center, internal order, or project) to another object, and that assignment has already been made previously. This error is common in scenarios involving cost allocations, internal orders, or when working with cost centers and profit centers.
  Cause:
  The error is triggered when:
  
  You attempt to assign a cost object that has already been assigned to another object.
  The system enforces a rule that prevents multiple assignments for the same object to ensure data integrity and accurate cost tracking.
  
  Solution:
  To resolve the KG1173 error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Review the existing assignments for the cost object you are trying to assign. You can do this by navigating to the relevant transaction (e.g., transaction codes like KSB1 for cost centers or KO03 for internal orders) and checking the assignment history.
  
  
  
  Remove Existing Assignment:
  
  If you find that the cost object is already assigned to another object and you need to change it, you may need to remove the existing assignment first. This can typically be done in the same transaction where you checked the assignments.
  
  
  
  Reassign the Cost Object:
  
  After removing the existing assignment, you can proceed to make the new assignment as needed.
  
  
  
  Consult Documentation:
  
  If you are unsure about the implications of changing assignments, consult your organization's documentation or SAP help resources to understand the impact on reporting and cost tracking.
  
  
  
  Check Configuration:
  
  In some cases, the error may be related to configuration settings in the controlling module. If you suspect this is the case, consult with your SAP CO module configuration team.
  
  
  
  User Authorization:
  
  Ensure that you have the necessary authorizations to make changes to assignments in the system. Lack of proper authorization can sometimes lead to unexpected errors.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as KSB1 (Cost Centers: Actual Line Items), KOB1 (Orders: Actual Line Items), and KO03 (Display Order) to check assignments.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as SAP frequently updates its software and documentation.
  Training and Documentation: If you are frequently encountering this error, consider additional training on SAP CO processes or reviewing internal documentation on cost object assignments.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in the controlling module.