Yeah, well that's just dandy. So who wants to spend an hour trying to figure out who has which pre-existing bed? That's not really my idea of fun. I ran into this problem on Nordhagen beach when I took over the settlement. I think I finally got the bed situation sorted out but it took forever. I hope Bethesda addressed this soon because it can be frustrating.
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I don't have the Slog yet with my current character but didn't know this. At least those settlers are named so it makes it a little easier to sort out who is who, and who has which bed.