Disappearing corpses, Problem : no small brass key Options

[huhuh1]

Hey there
I started playing candlelight episode I today.
Well I enjoyed it until I found myself stuck because one key is missing.

Actually, i went to the Friend arm inn and cleaned the whole map. I had no heal/potion remaining and i needed some health for my characters so i got to beregost and slept there for a few nights. By the time i came back to the Friend arm inn all the corpses had disappeared as well as the items they had. So i'm left there with just 5 keys ( copper / brass / small iron / iron / gold ) and a magic golems awaiting for a 6th.

Anything I could do to unstuck ? Like, maybe some CLUA code for the small brass key if it exists would work ?

Thanks anyway if you can solve my problem