How To Fix CNV_20900239 - Old/New vendor number existence and Implicit merge check:

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 239

• Message text: Old/New vendor number existence and Implicit merge check:

What causes this issue?

# Existence Check:
All the vendor numbers (old value) which are maintained in the mapping
should exist in the table LFA1, otherwise will result in error message.
Also, the maintained new vendor numbers should not exist in master table
LFA1, if exists then you can see a warning message.
# Implicit Merge:
If old vendor number is mapped to an already existing vendor number.
For example: If A >B and B already exists
If you want to convert vendor number A->B and B already exists in the
table LFA1, then:
In a 1:1 conversion, this is not allowed that source is changed into
target and target itself is not getting changed: Error message.
In an N: 1 conversion, you should check if you want the existing vendor
record to be overwritten: Warning message.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20900239 - Old/New vendor number existence and Implicit merge check: ?

  The SAP error message CNV_20900239 typically occurs during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is a conflict between old and new vendor numbers during the migration process, specifically related to the existence of vendor numbers that are being merged or updated.
  Cause:
  
  
  Duplicate Vendor Numbers: The error arises when the migration process detects that both the old and new vendor numbers exist in the system. This can happen if:
  
  The old vendor number is still active in the system.
  The new vendor number is already assigned to another vendor.
  
  
  
  Implicit Merge Check: The implicit merge check is a validation step that ensures that the old and new vendor numbers do not conflict. If both numbers exist, the system cannot proceed with the migration.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Vendor Numbers:
  
  Verify if the old vendor number is still active in the system. If it is, you may need to deactivate or delete it before proceeding with the migration.
  Check if the new vendor number is already assigned to another vendor. If it is, you may need to choose a different new vendor number.
  
  
  
  Data Cleanup:
  
  Clean up your vendor master data to ensure that there are no duplicates or conflicts. This may involve merging vendor records or deactivating obsolete vendor numbers.
  
  
  
  Adjust Migration Settings:
  
  If applicable, adjust the settings in the migration tool to handle the merging of vendor numbers appropriately. This may involve configuring the implicit merge settings or providing additional mapping information.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation related to the migration process for any specific guidelines or best practices regarding vendor number handling.
  
  
  
  Testing:
  
  After making the necessary adjustments, perform a test migration to ensure that the error does not occur again.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, which may provide specific instructions on handling vendor data during migration.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to address the CNV_20900239 error and successfully complete your vendor data migration.