Look you don't become a ghost because you want to, everyone knows that. You become a ghost when you can't move on. The right thing to do is to let them find eternal peace. Luckily, the thing that's keeping the ghost from moving on isn't the gold ring, which is great because it would otherwise violate some principles this adventure makes regarding respecting your choices. No, it's actually that people keep camping over their resting place. And currently, it's you. Which makes an easy problem to solve. The ghost guides you to its resting site and you dig up its bones, move them over a bit so they're out of the way, then bury them again. Normal festival night sort of stuff. What follows is a good morning's sleep for both you and, at last, the ghost.