How To Fix ARUN_MAIN015 - Confirmation is assigned and cannot be changed (see long text &1)

ARUN_MAIN015 - Overview

• Message type: E = Error

• Message class: ARUN_MAIN -

• Message number: 015

• Message text: Confirmation is assigned and cannot be changed (see long text &1)

What causes this issue?

The material is relevant to Supply Assignment (ARun) and assignments
exist for this document item. You cannot change the document item as the
unassign rule is already defined and the field check is set to <ZK>Error
</>in customizing under <LS>Cross-Application Components > Advanced
Available-to-Promise (aATP) > Supply Assignment (ARun) >
Cross-Applications > > Purchase Order Handling</>.

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?

By defining a rule to unassign orders, you specify exactly how the
system should react when an application type is modified (for example,
change in requirement date, goods receipt date, plant, storage location,
and so on).
You set the appropriate fields listed in the application type in
Customizing. For field checks, you can assign one of the following
options.
N = No Action
W = Warnings Before an Order is Unassigned
E = Change Not Permitted
Depending on the selected parameter, the system decides how and when the
quantities should be unassigned.

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_MAIN015 - Confirmation is assigned and cannot be changed (see long text &1) ?

  The SAP error message ARUN_MAIN015 indicates that a confirmation has already been assigned to a particular operation or process, and as a result, it cannot be changed. This error typically occurs in the context of production orders, confirmations, or other processes where a confirmation status is critical.
  
  Cause:
  
  Existing Confirmation: The primary cause of this error is that there is already a confirmation recorded for the operation or process you are trying to modify. This could be due to a previous entry that has locked the data for changes.
  Status Lock: The system may have a status lock on the operation, preventing any changes until the confirmation is either reversed or deleted.
  Data Integrity: SAP enforces data integrity rules to ensure that once a confirmation is made, the associated data remains consistent and reliable.
  
  
  Solution:
  
  Check Existing Confirmations: Review the existing confirmations for the operation or process. You can do this by navigating to the relevant