Message type: E = Error
Message class:  CNV_MBT - PCL message class 
Message number: 172
Message text: Settings of migration object & has been changed
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.
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.
The SAP error message CNV_MBT172 typically indicates that there has been a change in the settings of a migration object during a data migration process. This error is often encountered in the context of SAP S/4HANA migrations or when using the SAP Migration Cockpit.
Cause: The error can occur due to several reasons, including: Changes in Migration Object Settings: If the settings of the migration object (like mapping, transformation rules, or data sources) have been modified after the migration process has started, it can lead to inconsistencies. Concurrent Changes: If multiple users are working on the same migration object and one user makes changes while another is executing the migration, this can trigger the error. Versioning Issues: If the migration object is versioned and the version being used has been updated or changed, it can lead to this error.
Solution: To resolve the CNV_MBT172 error, you can take the following steps: Check Migration Object Settings: Review the settings
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_MBT171 Settings of migration object & has been changed and activated
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT170 Package &1 belonging to your project is still active in execution system
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT173 RFC Failure. Check the Define RFC Destinations activity for information.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT174 Runtime information built for migration object &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.