Probably a bug in the quest.

[Galahad]

Tell me please. Has anyone come across this? After my friend entered my world, I got a quest to talk to a raven about the fact that I killed a Dragon, but in my world I didn't kill her. Will I be able to kill her in my world and complete the task correctly? Or will this line of the quest now hang with me until the end of the game?
I really don't like moments like when my friend came to me in the world of the game, a bunch of recipes opened up to me in one moment, built and other things. I was a little upset that my game world didn't go its way.