Removing a custom email domain and then re-adding it to the same Apple ID.

I'm having trouble with my already set up custom email domain, will it be fine if i remove it from my Apple ID and re-add it?

It will be the same Apple ID and I'll be re-adding the same email addresses within the domain back. Is there a timer or lockout which doesn't allow me to re-register the same domain. Or does it not allow me to use the same email again?

For Example...

If I've got a domain currently called "customdomain234" and I've got one email address with it right now (that is working perfectly):

myname3421@customdomain234.com

If i press this button:

Will I be able to use the same "customdomain234", repeating the same setup process creating the same email address, on the same Apple ID. Or is there a limit - meaning I can never create this adress ever again?

But Why?

I need to do this as there is a glitch currently when i tried to add a new email (so theres 2 instead of 1) it tried to verifity the domain and it hasn't added the new email, and it's stuck verifying! If you know if theres another fix to this it would be much appreciated. (NOTE: The original email is working perfectly, so all DNA records are correct.)

Thanks for your help.