How To Fix /NFM/MM210 - Transaction &: NF key & already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: /NFM/MM -

• Message number: 210

• Message text: Transaction &: NF key & already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /NFM/MM210 - Transaction &: NF key & already exists ?

  The SAP error message /NFM/MM210 Transaction &: NF key & already exists typically occurs in the context of the SAP Materials Management (MM) module, particularly when dealing with the creation or modification of a material master record or a related transaction. This error indicates that the key you are trying to create already exists in the system, which prevents the transaction from being completed.
  Cause:
  
  Duplicate Entry: The most common cause of this error is that you are attempting to create a new record (such as a material master or a purchasing info record) with a key (like a material number or vendor number) that already exists in the database.
  Incorrect Data Entry: There may be a typographical error in the key you are trying to enter, leading to a conflict with an existing record.
  System Configuration: In some cases, the system configuration or settings may allow for certain keys to be unique, and an attempt to create a duplicate violates this rule.
  
  Solution:
  
  Check Existing Records: Before creating a new record, check the existing records to see if the key you are trying to use is already in use. You can do this by using transaction codes like MM03 (Display Material) or ME13 (Display Info Record) to search for the key.
  Use a Different Key: If the key is already in use, you will need to choose a different key that does not conflict with existing records.
  Correct Data Entry: Ensure that you have entered the key correctly without any typographical errors.
  Consult with Your SAP Administrator: If you believe that the key should not exist or if you need to delete or modify an existing record, consult with your SAP administrator or the relevant team to investigate further.
  Review Configuration Settings: If this issue persists and you believe it should not be happening, review the configuration settings related to the material master or the specific transaction to ensure that the uniqueness constraints are set correctly.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) to manage material records.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional context or solutions for specific scenarios.
  Documentation: Review SAP documentation or help files related to the Materials Management module for more detailed information on how to manage material records and handle errors.
  
  By following these steps, you should be able to resolve the error and proceed with your transaction in SAP.