Main domain removed. How to add again?

[olsenclub]

I made a big mistake - I removed my MAIN DOMAIN.
Now in my USER LEVEL I can't see anything.

Trying to add new domain in USER LEVEL and get an error:

Cannot Create Domain

The provided domain name matches your hostname.
The domain must not match your hostname.

Any ideas?

Thank you!

 

[JTE]

Check the hostname of the server, it should never be the same as the main domain. If your hostname is domain.com instead of server.domain.com or something you might want to change it