How To Fix CMS_AST311 - Partner with ID &1 and function &2 is already assigned to the sub-asset

CMS_AST311 - Overview

• Message type: E = Error

• Message class: CMS_AST - Message Class for Asset

• Message number: 311

• Message text: Partner with ID &1 and function &2 is already assigned to the sub-asset

What causes this issue?

You cannot assign a business partner with the same identification number
and partner function, to the sub-asset, more than once.

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?

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 CMS_AST311 - Partner with ID &1 and function &2 is already assigned to the sub-asset ?

  The SAP error message CMS_AST311 indicates that there is an attempt to assign a partner (such as a vendor, customer, or other business partner) to a sub-asset that is already assigned to that partner for the specified function. This typically occurs in the context of Asset Accounting or Contract Management within SAP.
  
  Cause:
  The error is triggered when:
  
  You are trying to assign a partner to a sub-asset that already has that partner assigned for the same function.
  There may be a misunderstanding of the business rules regarding partner assignments in the system.
  The system is enforcing a unique assignment rule for partners to sub-assets for specific functions.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Review the current assignments for the sub-asset in question. You can do this by navigating to the asset master data and checking the partner assignments.
  Identify if the partner is already assigned for the function you are trying