So far, nothing I've tried has fixed it. I had one time that it finally came up as the correct spot for Jamaica Plains, and I was able to donate scrap and some weapons, but when I went to check how much of an effect it had, it listed it as The Mechanist's Lair again and I haven't had it come up correctly since. I have tried deleting that desk and making a new one, I have tried leaving and coming back, I have tried opening it multiple different times and none of those things worked. Although when I tried opening it multiple different times (about 20 in all) it did change a little bit, it came up with a different incorrect settlement a couple times, once it listed it as The Slog (which is my other settlement I'm having this problem with), once it said Sanctuary Hills and once it said Nordhagen Beach.