LPT, many hackers will try to make a Google voice number in your name (on your account). but if you already have one then they can't since Google only allows one per account.

they want to make a Google voice number on your account and user it to hack others over the phone and set you up.

simply make a Google number and then use it at least once every couple months to keep it active. that's it. then nobody can make one in your name and do shady stuff with it