How To Fix CNV_DMC_UI_FW_EXCEPT031 - Data object &1 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_UI_FW_EXCEPT - Messages for exception classes

• Message number: 031

• Message text: Data object &1 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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_UI_FW_EXCEPT031 - Data object &1 already exists ?

  The SAP error message CNV_DMC_UI_FW_EXCEPT031 with the description "Data object &1 already exists" typically occurs in the context of data migration or data conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there is an attempt to create or insert a data object (like a record or entry) that already exists in the target system or database.
  Cause:
  
  Duplicate Data: The most common cause is that the data object you are trying to create already exists in the target system. This could be due to previous migration attempts or existing data in the system.
  Incorrect Mapping: There may be an issue with the mapping of source data to target data, leading to attempts to create duplicates.
  Configuration Issues: Misconfiguration in the migration settings or parameters can lead to this error.
  Data Integrity Constraints: The target system may have constraints (like primary keys or unique indexes) that prevent the insertion of duplicate records.
  
  Solution:
  
  Check Existing Data: Before running the migration, check the target system for existing records that match the data you are trying to import. You can use SQL queries or the relevant SAP transaction codes to verify this.
  Adjust Data: If duplicates are found, you may need to adjust your source data to ensure that it does not contain duplicates or modify the target data to accommodate the new records.
  Modify Migration Settings: Review the migration settings in the DMC to ensure that they are correctly configured to handle existing data. This may include options for updating existing records instead of trying to create new ones.
  Error Handling: Implement error handling in your migration process to skip or log duplicates instead of failing the entire migration.
  Consult Documentation: Refer to the SAP documentation for the Data Migration Cockpit or 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.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered and resolved similar issues.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP, including data cleansing, validation, and testing procedures.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.