How To Fix CNV_20900195 - All vendor numbers present in LFA1 are assigned in mapping

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 195

• Message text: All vendor numbers present in LFA1 are assigned in mapping

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20900195 - All vendor numbers present in LFA1 are assigned in mapping ?

  The SAP error message CNV_20900195 indicates that all vendor numbers present in the LFA1 table (which contains vendor master data) are already assigned in the mapping during a data migration or conversion process. This error typically arises in the context of using SAP's Migration Cockpit or during data transfer activities, particularly when using tools like SAP S/4HANA Migration or SAP Data Services.
  Cause:
  
  Duplicate Vendor Numbers: The error suggests that the vendor numbers in the source system (LFA1) are already mapped to the target system, which means there are no unassigned vendor numbers left for mapping.
  Mapping Configuration: The mapping configuration may not be set up correctly, or it may be that the source data has been fully utilized in the mapping process.
  Data Integrity Issues: There may be issues with the integrity of the data being migrated, such as duplicates or inconsistencies in the vendor numbers.
  
  Solution:
  
  Review Mapping Configuration: Check the mapping configuration to ensure that it is set up correctly. Make sure that the mapping is intended to cover all vendor numbers and that there are no unintended overlaps.
  Check for Duplicates: Investigate the source data in LFA1 for any duplicate vendor numbers. If duplicates exist, you may need to resolve these before proceeding with the mapping.
  Adjust Mapping Logic: If necessary, adjust the mapping logic to accommodate any additional vendor numbers that need to be mapped. This may involve creating new mappings or modifying existing ones.
  Data Cleansing: Perform data cleansing on the source data to ensure that all vendor numbers are unique and correctly formatted before attempting the migration again.
  Consult Documentation: Refer to SAP documentation or guides related to the specific migration tool you are using for any additional troubleshooting steps or best practices.
  
  Related Information:
  
  LFA1 Table: This table contains vendor master data in SAP. Each entry corresponds to a vendor and includes various details such as vendor number, name, address, and other relevant information.
  Migration Cockpit: This is a tool provided by SAP for migrating data to S/4HANA. It includes features for mapping, data validation, and error handling.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or solutions.
  SAP Community: Engaging with the SAP Community can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the error and successfully complete the vendor data migration.