How To Fix /SAPAPO/OM_UPGRADE153 - Class &, characteristic & in client & in namespace (&) reserved for SAP

/SAPAPO/OM_UPGRADE153 - Overview

• Message type: E = Error

• Message class: /SAPAPO/OM_UPGRADE -

• Message number: 153

• Message text: Class &, characteristic & in client & in namespace (&) reserved for SAP

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?

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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_UPGRADE153 - Class &, characteristic & in client & in namespace (&) reserved for SAP ?

  The SAP error message /SAPAPO/OM_UPGRADE153 typically indicates that there is an issue related to the use of certain classes and characteristics in the SAP Advanced Planning and Optimization (APO) module. This error message suggests that the class and characteristic you are trying to use are reserved for SAP and cannot be modified or used in the way you are attempting.
  
  Cause:
  
  Reserved Names: The class and characteristic names you are trying to use are reserved by SAP for internal purposes. This means that they cannot be created, modified, or deleted by customers.
  Namespace Conflicts: The error may arise if there is a conflict with the namespace, indicating that the object you are trying to create or modify is in a reserved namespace that is not available for customer use.
  Upgrade Issues: If you are upgrading your SAP system, certain classes and characteristics may have been reserved or changed in the new version, leading to