How To Fix CNV_20100671 - Old chart of accounts &1 exists more than once in the mapping

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20100 - Messageclass for chart of account conversion

• Message number: 671

• Message text: Old chart of accounts &1 exists more than once in the mapping

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100671 - Old chart of accounts &1 exists more than once in the mapping ?

  The SAP error message CNV_20100671 indicates that there is a problem with the mapping of the old chart of accounts during a data migration process, typically when using the SAP S/4HANA Migration Cockpit or similar tools. This error occurs when the same old chart of accounts (identified by the key &1) is found more than once in the mapping table, which can lead to ambiguity in the migration process.
  Cause:
  
  Duplicate Entries: The primary cause of this error is the presence of duplicate entries for the same old chart of accounts in the mapping table. This can happen if the mapping was not properly maintained or if there was an error during the data preparation phase.
  Incorrect Data Preparation: If the data extraction or transformation process did not correctly handle the old chart of accounts, it could lead to duplicates being created.
  Configuration Issues: There may be issues in the configuration of the migration tool or the mapping settings that allow for duplicates.
  
  Solution:
  
  Check Mapping Table: Review the mapping table for the old chart of accounts. Look for duplicate entries for the same chart of accounts key. You can do this by querying the mapping table in the database or using the migration cockpit interface.
  Remove Duplicates: If duplicates are found, you will need to remove or consolidate them. Ensure that each old chart of accounts is mapped uniquely to a new chart of accounts.
  Validate Data: After making changes, validate the mapping to ensure that all entries are correct and that there are no remaining duplicates.
  Re-run Migration: Once the mapping is corrected, re-run the migration process to see if the error persists.
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit, as it provides tools and guidelines for data migration, including how to handle mapping issues.
  Documentation: Refer to SAP documentation related to data migration and the specific error message for additional context and troubleshooting steps.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling mapping issues.
  Testing: Always perform thorough testing in a development or sandbox environment before executing migrations in production to avoid data integrity issues.
  
  By addressing the root cause of the duplicate entries in the mapping table, you should be able to resolve the error CNV_20100671 and proceed with your migration successfully.