How To Fix CNV_20100312 - __G/L accounts and cost elements in CoA &1 are not unique

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 312

• Message text: __G/L accounts and cost elements in CoA &1 are not unique

What causes this issue?

G/L accounts and cost elements within chart of accounts &V1& cannot be
uniquely identified with this chart of accounts, that is, the same IDs
may also be used in other charts of accounts.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100312 - __G/L accounts and cost elements in CoA &1 are not unique ?

  The SAP error message CNV_20100312 indicates that there are non-unique General Ledger (G/L) accounts or cost elements in the Chart of Accounts (CoA) specified. This error typically arises during data migration or conversion processes, particularly when using SAP's Conversion Tools or during the implementation of new financial structures.
  Cause:
  
  Duplicate Entries: The primary cause of this error is the presence of duplicate G/L accounts or cost elements in the specified Chart of Accounts. This can happen if the same account or cost element is defined multiple times, possibly due to incorrect data preparation or extraction processes.
  Data Migration Issues: If you are migrating data from another system or consolidating multiple CoAs, there may be overlaps or duplicates that were not resolved prior to the migration.
  Configuration Errors: Incorrect configuration settings in the system can also lead to this error, especially if the system is not set up to handle multiple CoAs correctly.
  
  Solution:
  
  
  Identify Duplicates: 
  
  Use transaction codes like FS00 (G/L Account Master) or OKB9 (Cost Element Master) to review the accounts and cost elements in the specified CoA.
  Run reports or queries to identify any duplicate entries in the CoA.
  
  
  
  Data Cleansing:
  
  Remove or merge duplicate G/L accounts or cost elements as necessary. Ensure that the accounts are unique and that any necessary adjustments are made to related transactions.
  If duplicates are found, decide on a strategy for consolidation or renaming to ensure uniqueness.
  
  
  
  Adjust Migration Data:
  
  If you are migrating data, ensure that the data being imported does not contain duplicates. This may involve modifying the source data or using transformation tools to ensure uniqueness.
  
  
  
  Check Configuration:
  
  Review the configuration settings in your SAP system to ensure that it is set up correctly to handle the Chart of Accounts and that there are no conflicting settings.
  
  
  
  Testing:
  
  After making the necessary changes, perform tests to ensure that the error does not reoccur. This may involve running the migration process again or checking the affected areas in the system.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  Documentation: Review SAP documentation on data migration and the Chart of Accounts to ensure compliance with best practices.
  Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who specializes in financial data migration.
  
  By addressing the root cause of the duplicates and ensuring that your data is clean and properly configured, you should be able to resolve the CNV_20100312 error effectively.