SeA serious bug of the panel is detected

When i create user, i add main domain. And i recreate this main domain again in tab "add domain" happen shit!!All site on vps server have a 500 error and i reboot server, it does not react at all and dont boot! Of course it's silly to create a domain in an existing domain, but there must be some kind of protection from the fool. I think it will be useful for panel developers!