CNV205 - Data record &1 &2 &3 exists already and will not be added.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 205

• Message text: Data record &1 &2 &3 exists already and will not be added.

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

AnswerBot

• What is the cause and solution for SAP error message CNV205 - Data record &1 &2 &3 exists already and will not be added. ?

  The SAP error message CNV205 indicates that a data record you are trying to add already exists in the system. This error typically occurs during data migration or data transfer processes, especially when using SAP's data migration tools or during the execution of conversion programs.
  Cause:
  The error occurs because the system has detected a duplicate entry based on the unique key or criteria defined for the data records. This can happen due to:
  
  Attempting to import data that has already been imported.
  Data inconsistencies or duplicates in the source data.
  Incorrect mapping or transformation rules that lead to the generation of duplicate records.
  
  Solution:
  To resolve the CNV205 error, you can take the following steps:
  
  
  Check for Existing Records:
  
  Verify if the record you are trying to add already exists in the target system. You can do this by querying the relevant database table using transaction codes like SE16 or SE11.
  
  
  
  Review Source Data:
  
  Inspect the source data for duplicates. Ensure that the data you are trying to import does not contain any duplicate entries that would violate the unique constraints in the target system.
  
  
  
  Adjust Data Migration Logic:
  
  If you are using a data migration tool (like SAP S/4HANA Migration Cockpit or LSMW), review the mapping and transformation rules to ensure they are correctly set up to avoid duplicates.
  
  
  
  Modify the Import Process:
  
  If appropriate, you can modify the import process to skip existing records. This may involve changing the settings in the migration tool or adjusting the logic in your custom program.
  
  
  
  Error Handling:
  
  Implement error handling in your data migration process to log and manage duplicates effectively. This can help you identify and resolve issues without stopping the entire migration process.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool or process you are using for additional guidance on handling duplicates.
  
  
  
  Related Information:
  
  Transaction Codes: SE16 (Data Browser), SE11 (Data Dictionary), LSMW (Legacy System Migration Workbench).
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to the CNV205 error.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP to minimize the occurrence of such errors in the future.
  
  By following these steps, you should be able to identify the cause of the CNV205 error and implement a suitable solution to resolve it.