Example:
A reseller wants to set his primary domain from www.xxx.com to www.aaa.com

Instructions:
You’d have to create another user for the User Level data.

1. Make a backup of the Reseller’s User data from the Reseller Panel -> User Backups
2. Rename the backup from reseller.tar.gz to newuser.tar.gz
3. Delete the domain and data from Reseller’s User Panel (Domain Administration)
4. Restore the newuser.tar.gz which will create the user and domain