How To Fix CNV20201423 - Duplicates: &1, target subobj.=&2,target No.=&3

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20201 -

• Message number: 423

• Message text: Duplicates: &1, target subobj.=&2,target No.=&3

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20201423 - Duplicates: &1, target subobj.=&2,target No.=&3 ?

  The SAP error message CNV20201423 indicates that there are duplicate entries in the data being processed during a conversion or migration task. This error typically arises in the context of data migration projects, especially when using SAP's data migration tools or during system conversions.
  Cause:
  The error message CNV20201423 specifically points to the presence of duplicate records in the target system for a particular object. The placeholders in the message (&1, &2, &3) represent:
  
  &1: The type of duplicate entry (e.g., a specific field or identifier).
  &2: The target sub-object where the duplicates are found.
  &3: The target number or identifier associated with the duplicates.
  
  This situation can occur due to:
  
  Data inconsistencies in the source system.
  Incorrect mapping or transformation rules during the migration process.
  Multiple records in the source system that are being mapped to the same target record.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Duplicates: Use the information provided in the error message to identify the specific records that are causing the duplication. You may need to run queries or reports in the source and target systems to find these duplicates.
  
  
  Data Cleansing: Once you have identified the duplicates, you will need to clean the data. This may involve:
  
  Removing or consolidating duplicate records in the source system.
  Adjusting the mapping rules to ensure that duplicates are not created in the target system.
  
  
  
  Adjust Migration Logic: If the duplicates are a result of the migration logic, you may need to adjust the transformation rules or logic in the migration tool you are using (e.g., LSMW, SAP S/4HANA Migration Cockpit).
  
  
  Re-run Migration: After addressing the duplicates, re-run the migration process to see if the error persists.
  
  
  Consult Documentation: If you are using a specific SAP migration tool, consult the relevant SAP documentation or notes for additional guidance on handling duplicates.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or solutions for this specific error message.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration, including data profiling, cleansing, and validation techniques.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  
  By following these steps, you should be able to resolve the CNV20201423 error and successfully complete your data migration or conversion task.