How To Fix MDC_GOV_BO_MSG001 - An instance with the same key already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_GOV_BO_MSG -

• Message number: 001

• Message text: An instance with the same key 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_GOV_BO_MSG001 - An instance with the same key already exists ?

  The SAP error message MDC_GOV_BO_MSG001 ("An instance with the same key already exists") typically occurs in the context of Master Data Governance (MDG) when you are trying to create or update a master data record that conflicts with an existing record. This error indicates that the system has detected a duplicate entry based on a unique key (such as a business partner ID, material number, etc.) that already exists in the database.
  Causes:
  
  Duplicate Data Entry: You are attempting to create a new instance of a master data record that has the same key as an existing record.
  Data Migration Issues: During data migration or data uploads, duplicate records may inadvertently be created.
  Incorrect Configuration: The configuration of the data model or the key fields may not be set up correctly, leading to conflicts.
  Concurrency Issues: Multiple users or processes may be trying to create or update the same record simultaneously.
  
  Solutions:
  
  
  Check for Existing Records: Before creating a new record, check the database to see if a record with the same key already exists. You can do this by searching for the record in the relevant application or transaction.
  
  
  Modify the Key: If you are sure that you need to create a new record, consider modifying the key fields to ensure uniqueness.
  
  
  Data Cleansing: If this error arises from data migration, perform data cleansing to remove duplicates before uploading data.
  
  
  Review Configuration: Check the configuration of your MDG system to ensure that the key fields are correctly defined and that there are no issues with the data model.
  
  
  Locking Mechanism: If the issue is due to concurrency, implement a locking mechanism to prevent multiple users from creating or updating the same record simultaneously.
  
  
  Error Handling: Implement error handling in your data processing logic to catch this error and provide meaningful feedback to users.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MDGIMG to access the configuration settings for Master Data Governance.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to the official SAP documentation for Master Data Governance for best practices on managing master data and avoiding duplicates.
  Support: If the issue persists, consider reaching out to SAP support for assistance, providing them with detailed information about the error and the context in which it occurs.
  
  By following these steps, you should be able to resolve the error and prevent it from occurring in the future.