IS it allowed to do so?Your account can't be "disabled", just go ahead and make a new one :)
As long as you're not using a second account for things like ban evading or sock-puppetry (pretending you're another person in order to get around certain things) or whatnot, then sure, it's allowed. Make as many accounts as you'd like then.
IS it allowed to do so?
By the way, this is my second account..., can't tell the first one... :P
I hated that old name so I made a new one!
As long as you're not using a second account for things like ban evading or sock-puppetry (pretending you're another person in order to get around certain things) or whatnot, then sure, it's allowed. Make as many accounts as you'd like then.