How To Fix CNV_20700088 - Duplicate entries: Old value : &1, New value: &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20700 - Material number conversion

• Message number: 088

• Message text: Duplicate entries: Old value : &1, New value: &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20700088 - Duplicate entries: Old value : &1, New value: &2 ?

  The SAP error message CNV_20700088, which indicates "Duplicate entries: Old value: &1, New value: &2," typically arises during data migration or conversion processes, particularly when using SAP's data migration tools or during system upgrades. This error suggests that there are duplicate entries in the data being processed, which violates the uniqueness constraints expected by the target system or data structure.
  Cause:
  
  Duplicate Data: The primary cause of this error is the presence of duplicate records in the source data that are being migrated or converted. This can happen if the same record exists multiple times with the same key fields.
  Data Mapping Issues: If the mapping of fields from the source to the target system is not correctly defined, it may lead to conflicts where two different records are trying to map to the same target key.
  Configuration Errors: Incorrect configuration in the data migration tool or settings that do not account for existing data can also lead to this error.
  
  Solution:
  
  
  Identify Duplicates: 
  
  Review the source data to identify the duplicate entries. You can use SQL queries or data analysis tools to find records with the same key fields.
  Example SQL query to find duplicates:
  SELECT key_field, COUNT(*)
  FROM your_table
  GROUP BY key_field
  HAVING COUNT(*) > 1;
  
  
  
  
  Resolve Duplicates:
  
  Once identified, you can either remove the duplicates or consolidate them into a single record, depending on the business requirements.
  Ensure that the remaining records maintain the integrity and completeness of the data.
  
  
  
  Adjust Data Mapping:
  
  Review the mapping configuration in the data migration tool to ensure that it correctly handles the data without causing conflicts.
  Make sure that the target fields are set up to accept the incoming data without duplication.
  
  
  
  Test Migration:
  
  After resolving the duplicates and adjusting the mapping, perform a test migration with a smaller dataset to ensure that the error does not occur again.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific data migration tool you are using (e.g., SAP S/4HANA Migration Cockpit, LSMW, etc.) for additional guidance on handling duplicates.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Data Quality Tools: Consider using data quality tools to clean and prepare your data before migration.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered and resolved similar issues.
  
  By following these steps, you should be able to resolve the CNV_20700088 error and successfully complete your data migration or conversion process.