Should I change my book title?

I've been Pagsulat a book called "Soul Fighter" and planning to ilathala it, until I googled the pamagat and recieved a lot of results. But instead of the S.F. being a book, it's a dreamcast video game, I believe, and it probably has a completely different story, but I'm still wondering if it would be a big deal if I don't change my book's title. Should I?