How To Fix MT009 - & & is already defined

SAP Error Message - Details

• Message type: E = Error

• Message class: MT - Field Selection

• Message number: 009

• Message text: & & is already defined

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MT009 - & & is already defined ?

  The SAP error message MT009 typically indicates that there is a problem with the material master data, specifically that a material with the same identifier (such as material number) is already defined in the system. This can occur in various contexts, such as during the creation of a new material or when trying to upload material data.
  Cause:
  
  Duplicate Material Number: The most common cause of this error is that the material number you are trying to create or upload already exists in the system.
  Incorrect Data Entry: There may be a typographical error in the material number you are trying to enter.
  Different Views: The material might exist in a different view or plant, which can lead to confusion if you are not aware of it.
  Data Migration Issues: If you are migrating data from another system, there may be duplicates that were not cleaned up before the migration.
  
  Solution:
  
  Check Existing Materials: Use transaction codes like MM03 (Display Material) or MM02 (Change Material) to check if the material number already exists in the system.
  Use a Different Material Number: If the material number is indeed taken, consider using a different, unique material number.
  Review Data Entry: Double-check the material number you are entering for any typographical errors.
  Check Different Views/Plants: Ensure that you are checking all relevant views and plants to see if the material exists in a different context.
  Data Cleanup: If you are migrating data, ensure that you have cleaned up any duplicates before the migration process.
  Consult with IT or SAP Support: If you are unable to resolve the issue, it may be helpful to consult with your IT department or SAP support for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material).
  Material Master Data: Understanding the structure and importance of material master data in SAP can help prevent such errors in the future.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes available.
  
  By following these steps, you should be able to identify the cause of the MT009 error and take appropriate action to resolve it.