Pre-migration check from cPanel fails with the following error when Reassign owner to option is specified:
Subscription 'example.com' does not exist on source server(s).
Plesk Web Host edition is used on the server.
This is a Plesk Migrator bug PMT-4772 which will be fixed in future Plesk updates.
As a workaround, reset the reassigning:
Go to Tools & settings > Migration and Transfer Manager > List of subscriptions.
Click Switch to advanced mode.
- Select example.com.
Click Reassign and select Reset all reassigning.
Restart the migration.
- When subscription is migrated, change it's owner to required one in Subscriptions > check example.com > click Change Subscriber