How To Fix CNV_DMC_SIN262 - Sales Data: &1 / &2 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 262

• Message text: Sales Data: &1 / &2 already exists

What causes this issue?

Within this Migration Object you can only extend new sales data. You
can't change already existing entries.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Delete these records from the template/staging table.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_SIN262 - Sales Data: &1 / &2 already exists ?

  The SAP error message CNV_DMC_SIN262 typically occurs during data migration processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there is an attempt to insert sales data that already exists in the target system, which violates the uniqueness constraints of the database.
  Cause:
  
  
  Duplicate Data: The most common cause of this error is that the sales data being migrated already exists in the target system. This could be due to:
  
  Previous migration attempts that were not fully cleaned up.
  Data being migrated from multiple sources that contain overlapping records.
  Incorrect mapping or transformation rules that lead to duplicate entries.
  
  
  
  Data Integrity Constraints: The target database may have constraints (like primary keys or unique indexes) that prevent the insertion of duplicate records.
  
  
  Solution:
  
  
  Identify Duplicates: Before migration, check the source data for duplicates. You can use tools or scripts to identify records that have the same key fields (like sales order number, customer ID, etc.).
  
  
  Data Cleansing: Clean the source data to remove duplicates. This may involve:
  
  Merging records.
  Deleting unnecessary duplicates.
  Ensuring that only unique records are included in the migration file.
  
  
  
  Adjust Migration Logic: If the duplicates are valid and should be retained, consider adjusting the migration logic to handle them appropriately. This could involve:
  
  Updating existing records instead of inserting new ones.
  Using a different strategy for handling duplicates (e.g., upsert operations).
  
  
  
  Check Migration Settings: Review the settings in the migration tool to ensure that it is configured correctly to handle existing data. Some tools have options to skip existing records or to update them instead of inserting.
  
  
  Log Analysis: Review the migration logs for more detailed information about the error. This can help pinpoint the specific records causing the issue.
  
  
  Testing: Before running the full migration, conduct a test migration with a smaller dataset to ensure that the process works as expected without encountering duplicate errors.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to the CNV_DMC_SIN262 error. SAP frequently updates its knowledge base with solutions for common issues.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP, including data validation, cleansing, and transformation techniques.
  Documentation: Review the documentation for the SAP Data Migration Cockpit or the specific migration tool you are using for additional configuration options and troubleshooting steps.
  
  By following these steps, you should be able to resolve the CNV_DMC_SIN262 error and successfully complete your data migration.