Indian Passport renewal in USA

Hi there, I'm trying to renew my passport abroad and I haven't yet met the "less than 1 year" criteria to renew it but I see the option to "make changes to Spouse name" which is what I'm thinking. But, will I get a new 10 year expiry date if I do this or will a new passport with the sane details but Spouse nane added will be printed?

Anyone had such an experience before, I do need to get my passport renewed at the earliest!

Thanks!