How To Fix MGVNUM020 - External material nuimber already exists

MGVNUM020 - Overview

• Message type: E = Error

• Message class: MGVNUM - Messages for material versions

• Message number: 020

• Message text: External material nuimber already exists

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 MGVNUM020 - External material nuimber already exists ?

  The SAP error message MGVNUM020 indicates that an external material number you are trying to use already exists in the system. This typically occurs when you are attempting to create or update a material master record with an external number that is already assigned to another material.
  
  Cause:
  
  Duplicate External Material Number: The external material number you are trying to assign is already in use for another material in the system.
  Incorrect Data Entry: There may have been a typographical error or misunderstanding regarding the external material number.
  Data Migration Issues: If you are migrating data from another system, there may be conflicts with existing material numbers in SAP.
  
  
  Solution:
  
  
  Check Existing Material Numbers:
  
  Use transaction code MM03 (Display Material) to search for the existing material using the external number you are trying to use. This will help you confirm if the number is indeed in use.
  
  
  
  Use a Different External Number:
  
  If the external number is already in