How To Fix MDG_MDF8101 - Changing &1 causes duplicate keys &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_MDF8 - Change Management

• Message number: 101

• Message text: Changing &1 causes duplicate keys &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_MDF8101 - Changing &1 causes duplicate keys &2 ?

  The SAP error message MDG_MDF8101 ("Changing &1 causes duplicate keys &2") typically occurs in the context of Master Data Governance (MDG) when you attempt to change a master data record in a way that would result in duplicate keys in the database. This is a data integrity issue, as each key (like a unique identifier for a record) must be unique within the system.
  Cause:
  The error is triggered when:
  
  You are trying to change a field in a master data record that is supposed to be unique (like a business partner ID, material number, etc.).
  The new value you are trying to assign to this field already exists in another record, leading to a violation of the uniqueness constraint.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify the Duplicate Key: 
  
  Check the value you are trying to assign to the field that is causing the error. 
  Look for existing records in the system that already have this value.
  
  
  
  Modify the Change:
  
  If the value you are trying to assign is indeed already in use, you will need to choose a different value that does not conflict with existing records.
  Ensure that the new value adheres to the uniqueness constraints defined in your MDG configuration.
  
  
  
  Data Validation:
  
  Before making changes, validate the data to ensure that it does not lead to duplicates. This can often be done through a search or validation function in the MDG application.
  
  
  
  Consult with Data Governance Team:
  
  If you are unsure about the correct values or the implications of changing certain records, consult with your organization's data governance team or the team responsible for maintaining master data.
  
  
  
  Check Configuration:
  
  If you believe the error is incorrect (for example, if the system should allow the change), check the configuration settings in MDG to ensure that the uniqueness constraints are set up correctly.
  
  
  
  Related Information:
  
  MDG Configuration: Understanding how uniqueness constraints are defined in your MDG setup can help prevent this error in the future.
  Data Quality Management: Implementing data quality checks can help identify potential duplicates before they become an issue.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional insights or updates related to this error message.
  
  By following these steps, you should be able to resolve the MDG_MDF8101 error and ensure that your master data remains consistent and accurate.