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

CNV_20100671 - Overview

• 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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CNV_20100671 - Details

• 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