How To Fix CNV_CMIS_A_20210 - Identical data found in table - after removing excluded fields

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CMIS_A_20 - Message class for Cross-Client Customizing Comparison (SLO)

• Message number: 210

• Message text: Identical data found in table - after removing excluded fields

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_CMIS_A_20210 - Identical data found in table - after removing excluded fields ?

  The SAP error message CNV_CMIS_A_20210 indicates that during a data migration or conversion process, the system has detected identical data entries in a specific table after the exclusion of certain fields. This typically occurs in the context of data migration projects, especially when using tools like SAP S/4HANA Migration Cockpit or other data conversion tools.
  Cause:
  
  Duplicate Data: The primary cause of this error is the presence of duplicate records in the source data that are being migrated. After excluding certain fields, the remaining fields may still contain identical values across multiple records.
  Data Transformation Rules: If the transformation rules applied during the migration process do not adequately differentiate between records, it can lead to duplicates.
  Incorrect Exclusion of Fields: The fields that were excluded may have been necessary for distinguishing between records, leading to the identification of duplicates.
  
  Solution:
  
  Identify Duplicates: Review the data in the source system to identify the duplicate records. You can use SQL queries or data profiling tools to find records with identical values in the relevant fields.
  Modify Exclusion Criteria: Reassess the fields that were excluded from the migration. Ensure that the exclusion does not lead to loss of necessary distinguishing information.
  Data Cleansing: Clean the source data to remove or consolidate duplicate records. This may involve:
  
  Merging records that are truly duplicates.
  Deleting unnecessary duplicates.
  Ensuring that each record has a unique identifier.
  
  
  Adjust Transformation Logic: If applicable, modify the transformation logic to ensure that it correctly handles duplicates and maintains data integrity.
  Testing: After making changes, re-run the migration process in a test environment to ensure that the error is resolved and that the data is correctly migrated.
  
  Related Information:
  
  Data Migration Tools: Familiarize yourself with the specific data migration tools being used (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) and their capabilities for handling duplicates.
  Documentation: Review SAP documentation related to data migration and the specific error message for additional context and troubleshooting steps.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on best practices for data migration.
  Consulting SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if the data is critical and complex.
  
  By following these steps, you should be able to resolve the CNV_CMIS_A_20210 error and successfully complete your data migration process.