How To Fix CNV_20900240 - Temporary duplicates and Scenario determination check:

CNV_20900240 - Overview

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 240

• Message text: Temporary duplicates and Scenario determination check:

What causes this issue?

If one vendor number is changing to another one which is already
existing in the mapping as an old vendor number.
For example: If A >B and B >C maintained in mapping
If you want to convert vendor number A->B and B->C and A & B
vendor numbers are already existing in the table LFA1, then you can see
a message specifying the Temporary duplicates .

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_20900240 - Details

• The SAP error message CNV_20900240, which refers to "Temporary duplicates and Scenario determination check," typically arises during data migration or conversion processes, particularly when using SAP's data migration tools like the SAP S/4HANA Migration Cockpit or other conversion tools.
  
  Cause:
  
  Temporary Duplicates: This error indicates that the system has detected temporary duplicate entries in the data being processed. This can happen if the same data is being loaded multiple times or if there are inconsistencies in the data source.
  Scenario Determination Check: The error may also relate to the system's inability to determine the correct scenario for processing the data due to these duplicates. This can occur if the data does not meet the expected criteria for a specific migration scenario.
  
  
  Solution:
  
  Identify Duplicates: Review the data being migrated to identify any duplicate entries. This can often be done by running queries or using data profiling tools to check for duplicates in the source data.
  Data