Email used by Another Apple ID
I am trying to get rid of my old Apple ID that is useless and update it to the one I have on my computer. I am trying to delete my old one and replace it with me new one but it says this email address is not available. Choose another address. This is the only phone I have. I had my previous phone stolen so it might still be plugged into that one but this phone is what I want it to be on. Is there anything I can do?
iPhone 5s, iOS 10