How To Fix CNV_20900228 - Duplicate vendor number check:

CNV_20900228 - Overview

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 228

• Message text: Duplicate vendor number check:

What causes this issue?

This check is performed on the old vendor numbers maintained in mapping.
If two records maintained with the same old vendor number in mapping,
then you can see an error message in the logs. For example: A -> B and A
-> C maintained in mapping This scenario is not supported by this
Package.

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_20900228 - Details

• The SAP error message CNV_20900228 typically indicates that there is a duplicate vendor number in the system during a data migration or conversion process. This error is often encountered when using SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer methods.
  
  Cause:
  The error occurs when the system detects that the vendor number being processed already exists in the target system. This can happen due to:
  
  Duplicate entries in the source data.
  Incorrect mapping of vendor numbers during the migration process.
  Existing vendor records in the target system that conflict with the incoming data.
  
  
  Solution:
  To resolve the CNV_20900228 error, you can take the following steps:
  
  
  Identify Duplicates:
  
  Check the source data for duplicate vendor numbers. You can use tools like Excel or SQL queries to identify any duplicates in the source dataset.
  
  
  
  Review Existing Vendors:
  
  In the target SAP system, check if the vendor number already exists. You can do this by using transaction