Hardcore update?

So I had a hardcore world that I worked on for a pretty long time, but when I was in a village helping an iron golem fight some zombies, I accidentally hit the Iron Golem... So you can guess what happened. I died, and it was pretty infuriating that all of the progress I had spent my time on was just gone. Maybe make it so you can continue the world in regular survival (Not hardcore) on a copy of it, with all of your progress saved?