How To Fix CNV791 - Potentially wrong duplicate processing type selected for table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 791

• Message text: Potentially wrong duplicate processing type selected for table &1

What causes this issue?

The table &V1& contains both key and non-key fields which are relevant
for the conversion. In that case you should bear in mind that the values
of the fields in the data part, that will not be aggregated, will be
taken from the table entry which is already in the database. For this
reason the value of the converted field depends on the order of
processing of the table entries.

How to fix this error?

To have a full control over what is written to the database the priority
routine should be defined for this table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV791 - Potentially wrong duplicate processing type selected for table &1 ?

  The SAP error message CNV791 indicates that there is a potential issue with the duplicate processing type selected for a specific table during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data conversion scenarios.
  Cause:
  The error occurs when the system detects that the selected duplicate processing type for a particular table is not appropriate or could lead to inconsistencies in the data being processed. This can happen due to:
  
  Incorrect Configuration: The duplicate processing type may not be suitable for the specific table or data being migrated.
  Data Integrity Issues: There may be existing duplicates in the source data that conflict with the selected processing type.
  Incompatibility: The selected processing type may not align with the business rules or requirements for the data in that table.
  
  Solution:
  To resolve the CNV791 error, you can take the following steps:
  
  
  Review Duplicate Processing Type:
  
  Check the duplicate processing type selected for the table in question. Ensure that it is appropriate for the data being processed.
  Common processing types include "Ignore," "Update," "Delete," and "Add." Choose the one that aligns with your data migration strategy.
  
  
  
  Analyze Source Data:
  
  Investigate the source data for duplicates. If duplicates exist, you may need to clean the data before migration.
  Use data profiling tools to identify and resolve any data quality issues.
  
  
  
  Adjust Migration Settings:
  
  If necessary, adjust the migration settings or configuration to ensure that the selected processing type is compatible with the data structure and business requirements.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or guides related to the specific migration tool you are using. There may be specific recommendations or best practices for handling duplicate records.
  
  
  
  Testing:
  
  After making adjustments, perform a test migration to ensure that the changes resolve the error and that data integrity is maintained.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide guidance based on your specific scenario.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration.
  Data Quality Tools: Consider using data quality tools to help identify and resolve data issues before migration.
  
  By following these steps, you should be able to address the CNV791 error and proceed with your data migration successfully.