How To Fix CNV20305703 - Entry for table &1 already exists in CNVTABLES

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20305 - Messages for conversion packages in CO

• Message number: 703

• Message text: Entry for table &1 already exists in CNVTABLES

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20305703 - Entry for table &1 already exists in CNVTABLES ?

  The SAP error message CNV20305703 indicates that there is an attempt to insert a duplicate entry into a table that is part of the conversion process, specifically in the context of the SAP Data Migration or Conversion process. The message states that an entry for the specified table (&1) already exists in the CNVTABLES.
  Cause:
  The error typically occurs due to one of the following reasons:
  
  Duplicate Data: The data being imported or converted contains duplicate entries that violate the unique constraints of the target table.
  Incorrect Mapping: There may be an issue with the mapping of source data to the target structure, leading to attempts to insert the same record multiple times.
  Previous Conversion Attempts: If a previous conversion attempt was not completed successfully, it may have left behind entries in the CNVTABLES, causing conflicts with new entries.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check for Duplicates:
  
  Review the data being imported to ensure that there are no duplicate entries. You can use SQL queries or data analysis tools to identify duplicates in the source data.
  
  
  
  Review Mapping Configuration:
  
  Verify the mapping configuration in the conversion program to ensure that it is set up correctly and that it does not lead to duplicate entries.
  
  
  
  Clean Up Existing Data:
  
  If the error is due to leftover data from a previous conversion attempt, you may need to clean up the CNVTABLES table. This can involve deleting the existing entries that are causing the conflict. Be cautious with this step, as it may affect the integrity of your data.
  
  
  
  Log Analysis:
  
  Check the logs for more detailed information about the error. This can provide insights into which specific entries are causing the conflict.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific conversion process you are using. There may be specific guidelines or known issues that can help you resolve the error.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They may have additional insights or patches available for your specific situation.
  
  
  
  Related Information:
  
  CNVTABLES: This is a temporary table used during data migration processes in SAP. It stores data that is being converted from one format to another.
  Data Migration Tools: Familiarize yourself with the tools and methodologies used for data migration in SAP, such as SAP S/4HANA Migration Cockpit, LSMW (Legacy System Migration Workbench), or other ETL (Extract, Transform, Load) tools.
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV20305703 error in your SAP environment.