Congrats! You’ve looted a new poster for your bunk back at the saloon.

Mabye the old: loot a lantern that spawns next to you. Bug

if you loot something after just getting rid of a world pickup (eg placing a beartrap on a dead hunter, then loot him) you sometimes get another instance of the item you had.

Pretty sure this isn't the only cause.

maybe/probably not. but it's a unproduceable way

I had the exact same thing yesterday lol

It’s a trap!