How To Fix ARUN_MAIN001 - Item &1 cannot be changed; item is already assigned (see long text &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: ARUN_MAIN -

• Message number: 001

• Message text: Item &1 cannot be changed; item is already assigned (see long text &2)

What causes this issue?

The material is relevant to Supply Assignment (ARun) and an assignment
exists for this document item. You cannot change the document item for
one of the following reasons:
Field check customizing is not maintained.
Based on the field check customizing, changing the item is not
permitted.
Outbound delivery exists for this item.
Changing an article is not permitted.
Item category is not enabled for to unassign an order.
At least one of the VAS items is assigned; changing this item is not
permitted.

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?

Define rules to unassign orders at item category level in Customizing
for
<DS:SIMG.SIMG_CFMENUOLSDVOV7>Define Item Categories</> under <LS>Sales
and Distribution > Sales > Sales Document > Sales Document Item</>.

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 ARUN_MAIN001 - Item &1 cannot be changed; item is already assigned (see long text &2) ?

  The SAP error message ARUN_MAIN001 indicates that an item (identified by &1) cannot be changed because it is already assigned to another object or process. This typically occurs in scenarios where items are linked to specific transactions, documents, or processes that prevent modifications.
  Cause:
  
  
  Item Assignment: The item you are trying to change is already assigned to another document or transaction. This could be due to:
  
  The item being part of a completed or ongoing process.
  The item being locked by another user or transaction.
  The item being referenced in a way that does not allow changes.
  
  
  
  Data Integrity: SAP enforces data integrity rules to prevent changes that could lead to inconsistencies in the system.
  
  
  Solution:
  
  
  Check Assignments: Review the item to see where it is currently assigned. You can do this by:
  
  Navigating to the relevant transaction or document where the item is used.
  Checking the item’s status and any related documents.
  
  
  
  Unlock the Item: If the item is locked by another user or transaction, you may need to wait until it is released or contact the user to unlock it.
  
  
  Review Long Text: The error message references a long text (see long text &2). This long text may provide additional context or specific instructions on how to resolve the issue. Make sure to read it carefully.
  
  
  Consult Documentation: If you have access to SAP documentation or support, consult it for more detailed troubleshooting steps related to this specific error.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with a functional expert who can provide assistance based on your specific configuration and usage of the system.
  
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may need to use specific transaction codes to view or manage the item (e.g., ME23N for purchase orders, VA03 for sales orders).
  User Authorizations: Ensure that you have the necessary authorizations to make changes to the item.
  System Logs: Check system logs for any additional error messages or warnings that may provide further insight into the issue.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.