How To Fix CNV_20100641 - Duplicate COES table key: &1 &2 &3 &4

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 641

• Message text: Duplicate COES table key: &1 &2 &3 &4

What causes this issue?

Converting table COES would lead to following duplicate table keys:
OBJNR, AWTYP = &V1&
AWKEY, AWSYS, AWPOS = &V2&
WRTTP, VRGNG, GJAHR = &V3&
PERIO, KSTAR, POSIT, TWAER = &V4&

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_20100641 - Duplicate COES table key: &1 &2 &3 &4 ?

  The SAP error message CNV_20100641, which indicates a "Duplicate COES table key," typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error suggests that there are duplicate entries in the COES (Cost Object Assignment) table, which is used to manage cost object assignments in SAP.
  Cause:
  The error occurs when the system encounters multiple records in the COES table that share the same key values. The key values are usually a combination of fields that uniquely identify a record in the table. The specific fields involved in the key are represented by the placeholders &1, &2, &3, and &4 in the error message. 
  Common causes for this error include:
  
  Data inconsistencies in the source system.
  Incorrect data mapping during the migration process.
  Duplicate records in the source data that were not identified or cleaned up prior to migration.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Duplicate Records:
  
  Use SQL queries or SAP transaction codes (like SE16 or SE11) to check the COES table for duplicate entries based on the key fields indicated in the error message.
  Analyze the data to understand why duplicates exist.
  
  
  
  Data Cleanup:
  
  If duplicates are found, determine which records are valid and which can be removed or merged.
  Clean up the source data to ensure that only unique records are present before attempting the migration again.
  
  
  
  Adjust Migration Mapping:
  
  Review the mapping configuration in the migration tool to ensure that it correctly handles the data and does not create duplicates during the migration process.
  
  
  
  Re-run the Migration:
  
  After cleaning up the data and adjusting the mapping, re-run the migration process to see if the error persists.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using for any additional guidance or known issues.
  
  
  
  Engage SAP Support:
  
  If the issue persists after following the above steps, consider reaching out to SAP Support for further assistance, providing them with the error details and any relevant logs.
  
  
  
  Related Information:
  
  COES Table: This table is part of the controlling module in SAP and is used for managing cost object assignments.
  Data Migration Tools: Familiarize yourself with the tools and methodologies used for data migration in SAP, such as the SAP S/4HANA Migration Cockpit, LSMW (Legacy System Migration Workbench), or other ETL (Extract, Transform, Load) tools.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify and resolve the issue causing the CNV_20100641 error in your SAP environment.