How To Fix /SAPAPO/OM_UPGRADE126 - Characteristic & was not adjusted, since not unique in R/3 class system

/SAPAPO/OM_UPGRADE126 - Overview

• Message type: E = Error

• Message class: /SAPAPO/OM_UPGRADE -

• Message number: 126

• Message text: Characteristic & was not adjusted, since not unique in R/3 class system

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_UPGRADE126 - Characteristic & was not adjusted, since not unique in R/3 class system ?

  The SAP error message /SAPAPO/OM_UPGRADE126 indicates that a characteristic in the R/3 class system is not unique, which is causing issues during the upgrade or data transfer process in SAP Advanced Planning and Optimization (APO). This error typically arises when there are multiple characteristics with the same name or identifier in the R/3 system, leading to ambiguity in the APO system.
  
  Cause:
  
  
  Non-Unique Characteristics: The primary cause of this error is that the characteristic specified in the error message is not unique in the R/3 class system. This can happen if:
  
  There are multiple characteristics with the same name in different classes.
  The characteristics are not properly defined or managed in the R/3 system.
  
  
  
  Data Inconsistency: There may be inconsistencies in the data between the R/3 and APO systems, particularly if the systems have not been synchronized properly.
  
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Non-Unique Characteristics:
  
  Use transaction codes like CL02 (Change Class) or