How To Fix CNV_20800144 - Old customer &1 does not exist (in table KNA1)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 144

• Message text: Old customer &1 does not exist (in table KNA1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20800144 - Old customer &1 does not exist (in table KNA1) ?

  The SAP error message CNV_20800144 indicates that the system is unable to find a customer record in the KNA1 table (which stores general data for customers) for the specified customer number. This error typically arises during data migration or conversion processes, especially when using SAP's data migration tools.
  Cause:
  
  
  Missing Customer Data: The customer number referenced in the error does not exist in the KNA1 table. This could be due to:
  
  The customer was never created in the system.
  The customer was deleted or archived.
  There was an error during the data migration process that caused the customer data not to be transferred correctly.
  
  
  
  Incorrect Mapping: If you are migrating data from another system, there may be an issue with how customer numbers are mapped between the source and target systems.
  
  
  Data Consistency Issues: There may be inconsistencies in the data being migrated, such as missing dependencies or related records.
  
  
  Solution:
  
  
  Verify Customer Existence: Check the KNA1 table to see if the customer number exists. You can do this by executing a query in the SAP database or using transaction codes like SE16 or SE16N.
  
  
  Data Migration Review: If you are migrating data, review the migration logs and mapping configurations to ensure that all customer records were included and correctly mapped.
  
  
  Create Missing Customers: If the customer is indeed missing and should exist, you may need to create the customer record manually in the KNA1 table.
  
  
  Check for Deletions: If the customer was deleted, you may need to restore it from an archive or recreate it if necessary.
  
  
  Consult Documentation: If you are using a specific migration tool (like SAP S/4HANA Migration Cockpit), refer to the documentation for troubleshooting steps related to this error.
  
  
  Contact Support: If the issue persists and you cannot determine the cause, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  
  Related Information:
  
  KNA1 Table: This table contains general data for customers, including customer number, name, address, and other relevant information.
  Data Migration Tools: Familiarize yourself with the tools and methodologies used for data migration in SAP, such as the SAP S/4HANA Migration Cockpit or SAP Data Services.
  Transaction Codes: Use transaction codes like SE16, SE16N, or SE11 to view and analyze the KNA1 table and other related tables.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.