How To Fix CMD_MATERIAL_API023 - You cannot change the material number from &1 to &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CMD_MATERIAL_API - Message Class for Sydney Material API Layer

• Message number: 023

• Message text: You cannot change the material number from &1 to &2

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 CMD_MATERIAL_API023 - You cannot change the material number from &1 to &2 ?

  The SAP error message CMD_MATERIAL_API023 indicates that you are attempting to change a material number from one value (&1) to another value (&2), which is not allowed in the system. This error typically arises in scenarios where the material number is being modified in a way that violates the system's constraints or business rules.
  Cause:
  
  Material Number Restrictions: In SAP, material numbers are often treated as unique identifiers. Changing a material number directly can lead to inconsistencies in data integrity, especially if the material is already linked to various transactions, documents, or master data.
  Configuration Settings: The system may be configured to prevent changes to material numbers for certain types of materials or under specific conditions.
  Material Status: The material may be in a status that does not allow changes (e.g., blocked, obsolete).
  Dependencies: There may be dependencies or relationships with other objects (like BOMs, routings, etc.) that prevent the change.
  
  Solution:
  
  Use the Correct Transaction: If you need to change a material number, consider using the appropriate transaction or method. For example, you might need to create a new material and transfer the data from the old material to the new one.
  Check Material Status: Ensure that the material is not blocked or in a status that prevents changes. You may need to change the status before attempting to modify the material number.
  Consult Configuration: Review the configuration settings in your SAP system to see if there are any restrictions on changing material numbers. This may require assistance from your SAP Basis or configuration team.
  Data Migration: If you need to change the material number for a valid business reason, consider using data migration tools or processes (like LSMW or SAP Data Services) to create a new material and migrate the relevant data.
  Documentation and Approval: Ensure that any changes to material numbers are documented and approved according to your organization's change management policies.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM02 (Change Material) and MM01 (Create Material) for managing material master data.
  User Authorization: Ensure that you have the necessary authorizations to make changes to material master data.
  Training and Documentation: Review training materials or documentation related to material management in SAP to understand the implications of changing material numbers.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in material management.