So I got the defend a settlement quest for Oberland Station. For that quest, as you all know, you have to go take care of the raiders in the Back Street apparel. After that, you go and talk to the settlers in Oberland, followed by speaking to Preston Garvey. The problem is, I've completed every step of this quest outside of speaking to Garvey. Any time I try talking to him to complete the quest, he just gives me normal dialogue options, and the part of the quest that says I have to talk to him is now gray. Also, I cannot seem to deactivate the quest. Any idea what I might have done wrong?