How To Fix CNV20200018 - Table ONRAO: data is changed; possibly no duplicates

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20200 - Messages for development class CNV_20200

• Message number: 018

• Message text: Table ONRAO: data is changed; possibly no duplicates

What causes this issue?

The simulated conversion of the company code in the table ONRAO gave
the following results:
Data gets changed.
No duplicates caused by the company code conversion were detected.

System Response

Warning
CO object numbers are potentially relevant for the conversion and are
not excluded from the conversion.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20200018 - Table ONRAO: data is changed; possibly no duplicates ?

  The SAP error message CNV20200018, which indicates that "Table ONRAO: data is changed; possibly no duplicates," typically arises during data migration or conversion processes, particularly when using SAP's data migration tools like the SAP S/4HANA Migration Cockpit or the SAP Data Services.
  Cause:
  
  Data Integrity Issues: The error suggests that there are changes in the data that may lead to inconsistencies or violations of unique constraints. This can happen if the data being migrated has duplicates or if the source data has been modified after the initial extraction.
  Duplicate Records: The system may have detected potential duplicates in the ONRAO table, which is causing the migration process to halt to prevent data integrity issues.
  Data Locking: If the data in the ONRAO table is being accessed or modified by another process during the migration, it can lead to this error.
  
  Solution:
  
  Check for Duplicates: Review the source data for duplicates. You can run queries to identify any duplicate records in the ONRAO table and resolve them before attempting the migration again.
  Data Consistency: Ensure that the data in the source system is consistent and has not been modified during the migration process. If changes are necessary, they should be made before the migration starts.
  Data Locking: Ensure that no other processes are locking the ONRAO table during the migration. You may need to schedule the migration during a maintenance window when the system is less active.
  Review Migration Logs: Check the migration logs for more detailed information about the error. This can provide insights into which specific records are causing the issue.
  Use Data Cleansing Tools: If necessary, use data cleansing tools to clean up the data before migration. This can help eliminate duplicates and ensure data integrity.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any additional troubleshooting steps or known issues.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on handling data migration issues.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it may have specific features to handle data validation and error resolution.
  Data Model: Understand the data model of the ONRAO table and its relationships with other tables to ensure that all dependencies are considered during the migration.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to successfully complete the data migration process.