How To Fix CNV20400052 - Data Exists in Table &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20400 - Message class CNV20400

• Message number: 052

• Message text: Data Exists in Table &1

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20400052 - Data Exists in Table &1 ?

  The SAP error message CNV20400052 indicates that there is existing data in a specific table (denoted by &1) that is preventing a certain operation from being completed. This error typically arises during data migration or conversion processes, particularly when using SAP's data migration tools like the SAP S/4HANA Migration Cockpit or other conversion tools.
  Cause:
  The error occurs because the system has detected that there is already data present in the target table that conflicts with the operation you are trying to perform. This could happen in scenarios such as:
  
  Attempting to load data into a table that already contains records.
  Trying to delete or modify records in a table that is being referenced or has existing entries.
  Running a migration or conversion process that expects the target table to be empty or in a specific state.
  
  Solution:
  To resolve the error CNV20400052, you can take the following steps:
  
  
  Check the Table Contents: Identify the table mentioned in the error message and check its contents. You can do this using transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser).
  
  
  Backup Data: If the existing data is important, ensure you have a backup before making any changes.
  
  
  Clear the Table: If the existing data is not needed, you can delete the records from the table. Be cautious with this step, as it may lead to data loss.
  
  
  Adjust Migration Settings: If you are using a migration tool, check the settings or parameters to ensure that it is configured correctly. Some tools allow you to skip existing records or handle them differently.
  
  
  Consult Documentation: Review the documentation for the specific migration or conversion tool you are using. There may be specific guidelines or prerequisites that need to be followed.
  
  
  Check for Dependencies: Ensure that there are no dependencies or constraints that are preventing the operation. This may involve checking foreign key relationships or other constraints in the database.
  
  
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration or the migration process you are using.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11, SE16, and others that can help you analyze and manage database tables.
  Migration Tools: Understand the specific migration tools you are using, such as the SAP S/4HANA Migration Cockpit, and their requirements.
  Data Integrity: Always ensure that data integrity is maintained during migration processes to avoid issues in the future.
  
  By following these steps, you should be able to address the CNV20400052 error and proceed with your data migration or conversion tasks.