A domain name must be disconnected form an exiting Envato Sites website before it can be connected to a new Envato Sites website.
Please note: A domain name must be disconnected before a website is deleted.
To remove a domain name from a website:
- Open the site in the Editor
- Go to the Publish page
- Open the Custom Domain tab
- Click the Remove domain button

Once the domain name is disconnected, you'll then be able to add a new one.