I sent Ser Lyn Corbray to the Wall and he was supposed to give me Lady Forlorn, but instead I got script error: invalid item modifier id: 131072 and no Lady Forlorn. I also didn't get Red Rain when I sent Lord Dunstan Drumm to the Wall, but didn't notice a script error at the time (wasn't looking for one). It seems like WSE2 attempted to give a cracked valyrian steel weapon, but that doesn't exist in the game. I used the save in the normal game and he did give me Lady Forlorn, so it seems like an issue with WSE2. I posted this info on WSE2 forum and was told it should be fixed by the developer.