How To Fix CNV_DMC_SIN257 - Description in language: &1 already exists

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 257

• Message text: Description in language: &1 already exists

What causes this issue?

With object 'Material - extend existing record by new org levels' you
can only extend new material descriptions. 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.

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_SIN257 - Description in language: &1 already exists ?

  The SAP error message CNV_DMC_SIN257 typically indicates that there is an attempt to create or insert a record in the system that already exists. This can occur in various contexts, such as during data migration, data conversion, or when using specific SAP tools like the Data Migration Cockpit (DMC).
  Cause:
  
  
  Duplicate Records: The most common cause is that the system is trying to insert a record that already exists in the target database. This could be due to:
  
  Data being migrated from a legacy system where the same records exist.
  Incorrect mapping or transformation rules that lead to duplicate entries.
  Manual entries that conflict with automated processes.
  
  
  
  Configuration Issues: There may be issues with the configuration of the data migration process, such as incorrect settings that do not account for existing records.
  
  
  Data Integrity Constraints: The database may have constraints (like primary keys or unique indexes) that prevent the insertion of duplicate records.
  
  
  Solution:
  
  
  Check for Existing Records: Before running the migration or data import, check the target system for existing records that may conflict with the new data. You can do this by querying the database or using transaction codes in SAP to view existing entries.
  
  
  Adjust Data Mapping: Review the data mapping and transformation rules to ensure that they are correctly set up to avoid duplicates. This may involve modifying the source data or the mapping logic.
  
  
  Use Update Instead of Insert: If the intention is to update existing records rather than insert new ones, modify the process to perform updates instead of inserts.
  
  
  Data Cleansing: Clean the source data to remove duplicates before migration. This can involve deduplication processes or using tools to identify and merge duplicate records.
  
  
  Error Handling: Implement error handling in your migration process to log and manage duplicates gracefully, allowing the process to continue while reporting issues.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for additional guidance on handling duplicates.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Data Migration Cockpit (DMC): Familiarize yourself with the features and capabilities of the DMC, as it may have built-in functionalities to handle duplicates.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed, providing insights or solutions from other users.
  
  By following these steps, you should be able to identify the cause of the CNV_DMC_SIN257 error and implement a suitable solution to resolve it.