CNV209 - Data record &1 exists already and will not be inserted

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 209

• Message text: Data record &1 exists already and will not be inserted

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.

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AnswerBot

• What is the cause and solution for SAP error message CNV209 - Data record &1 exists already and will not be inserted ?

  The SAP error message CNV209, which states "Data record &1 exists already and will not be inserted," typically occurs during data migration or data upload processes, particularly when using SAP's data migration tools like the SAP S/4HANA Migration Cockpit or other data transfer methods. This error indicates that the system has detected a duplicate record that already exists in the target database, and as a result, it will not allow the insertion of the new record.
  Cause:
  
  
  Duplicate Data: The most common cause of this error is that the data being imported contains records that already exist in the target system. This could be due to:
  
  Previous data uploads that included the same records.
  Data being extracted from a source system that has overlapping records with the target system.
  Incorrect data preparation or transformation that leads to duplicates.
  
  
  
  Primary Key Violation: The record being inserted may have a primary key or unique constraint that is violated by the existing record in the database.
  
  
  Data Migration Logic: The logic used in the data migration process may not account for existing records, leading to attempts to insert duplicates.
  
  
  Solution:
  
  
  Check for Duplicates: Before performing the data upload, check the source data for duplicates. You can use tools like Excel or SQL queries to identify and remove duplicate records.
  
  
  Data Cleansing: Cleanse the data to ensure that only unique records are being uploaded. This may involve:
  
  Removing duplicates from the source data.
  Merging records if necessary.
  
  
  
  Adjust Migration Logic: If you are using a migration tool, review the configuration and logic to ensure it handles existing records appropriately. You may need to set it to update existing records instead of trying to insert them.
  
  
  Use of Flags: If applicable, use flags or indicators in your data to mark records for update rather than insert, if they already exist.
  
  
  Error Handling: Implement error handling in your data migration process to log and manage errors effectively, allowing you to review and address issues post-migration.
  
  
  Consult Documentation: Review the SAP documentation related to the specific migration tool you are using for any additional configuration options or best practices.
  
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may be using transaction codes like LSMW (Legacy System Migration Workbench), or the SAP S/4HANA Migration Cockpit.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP, including data validation, cleansing, and testing.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling data migration issues.
  
  By following these steps, you should be able to resolve the CNV209 error and successfully complete your data migration or upload process.