How To Fix CNV20201416 - Duplicates: Target subobj. = &1, Target (doc.)No.= &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20201 -

• Message number: 416

• Message text: Duplicates: Target subobj. = &1, Target (doc.)No.= &2

Self-Explanatory Message

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• What is the cause and solution for SAP error message CNV20201416 - Duplicates: Target subobj. = &1, Target (doc.)No.= &2 ?

  The SAP error message CNV20201416 indicates that there are duplicate entries in the target system during a data migration or conversion process. This error typically arises when the system detects that the same target sub-object (e.g., a document number) is being processed more than once, which violates the uniqueness constraints of the target database.
  Cause:
  
  Duplicate Data in Source: The source data may contain duplicate entries that are being migrated to the target system.
  Incorrect Mapping: The mapping of source data to target fields may not be set up correctly, leading to multiple source records being mapped to the same target record.
  Data Transformation Issues: During the transformation process, data may not be properly filtered or aggregated, resulting in duplicates.
  Concurrency Issues: If multiple processes are trying to insert the same record simultaneously, it can lead to duplicates.
  
  Solution:
  
  Identify Duplicates: Review the source data to identify any duplicate entries that may be causing the issue. You can use SQL queries or data profiling tools to find duplicates.
  Clean Source Data: Remove or consolidate duplicate records in the source data before migration. This may involve deduplication processes or data cleansing activities.
  Check Mapping Configuration: Ensure that the mapping between source and target fields is correctly configured to avoid unintentional duplicates.
  Adjust Transformation Logic: If you are using transformation logic (e.g., in a data migration tool), ensure that it is correctly set up to handle duplicates.
  Run Migration in Batches: If possible, run the migration in smaller batches to isolate and identify the specific records causing the issue.
  Consult SAP Documentation: Refer to SAP notes or documentation related to the specific migration tool or process you are using for additional guidance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or solutions for this specific error message.
  Data Migration Tools: If you are using a specific SAP data migration tool (like SAP S/4HANA Migration Cockpit or SAP Data Services), consult the documentation for best practices and troubleshooting tips.
  Error Logs: Review the error logs generated during the migration process for more detailed information about the duplicates and their source.
  
  By addressing the root cause of the duplicates and ensuring that the data is clean and correctly mapped, you should be able to resolve the CNV20201416 error and successfully complete the migration process.