How To Fix CNV_20900080 - The scenario is N:M for vendor numbers

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 080

• Message text: The scenario is N:M for vendor numbers

What causes this issue?

It was found that a vendor has been entered more than once as an "old"
value in your mapping. This is a split scenario. In addition, your
mapping includes at least one merge of vendor records.

System Response

The current package does not support vendor record split.

How to fix this error?

Remove the split scenario, that is, make sure that no vendor record is
included more than once as an old value in your mapping.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20900080 - The scenario is N:M for vendor numbers ?

  The SAP error message CNV_20900080 typically occurs during data migration processes, particularly when dealing with vendor numbers in a scenario where there is a many-to-many (N:M) relationship. This error indicates that there are issues with the mapping or transformation of vendor numbers from the source system to the target system.
  Cause:
  
  Data Mapping Issues: The error often arises when the mapping of vendor numbers from the source system to the target system is not properly defined, leading to conflicts or duplicates.
  Duplicate Vendor Numbers: If the same vendor number exists in the source system for multiple records and there is no clear mapping to a single vendor in the target system, this can trigger the error.
  Inconsistent Data: Inconsistencies in the vendor data, such as different formats or missing information, can also lead to this error.
  Configuration Issues: Incorrect configuration in the data migration tool or settings related to vendor number handling can cause this error.
  
  Solution:
  
  Review Mapping: Check the mapping of vendor numbers between the source and target systems. Ensure that each vendor number in the source system has a corresponding unique entry in the target system.
  Data Cleansing: Clean the data in the source system to eliminate duplicates and ensure consistency. This may involve merging records or standardizing formats.
  Adjust Configuration: Review and adjust the configuration settings in the data migration tool to handle N:M relationships appropriately. This may involve setting up rules for how to handle multiple vendor numbers.
  Use a Staging Area: Consider using a staging area to preprocess the data before migrating it to the target system. This allows for better control over data transformation and mapping.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using (e.g., SAP S/4HANA Migration Cockpit) for additional guidance on handling vendor number mappings.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Data Migration Tools: Familiarize yourself with the data migration tools available in SAP, such as the SAP S/4HANA Migration Cockpit, and their capabilities for handling complex data relationships.
  Testing: Conduct thorough testing of the migration process in a development or sandbox environment before executing it in production to identify and resolve any issues.
  
  By addressing the underlying causes and following the suggested solutions, you should be able to resolve the CNV_20900080 error and successfully complete the data migration process.