my email is hacked

I got an email for an old gmail account of mine that someone logged in and changed the verification email and i cannot get in. I don’t really use this account ever anymore. should I be worried?? like I said, my finances, socia medias, and everything else I do lately is the other gmail account I have which is still intact. I haven’t even typed this email into anything for years and I have no idea what is being sent to it. should I be concerned?? I cannot get back in no matter what.