Yep, this is probably exactly what happened. The second generation Rogues don't have the key or lock. I have the same black Rogue and mine also doesn't have a key. Mine actually came with a little foam thing stuffed in there in order to keep shape. Maybe just put a little tissue or foam in there and leave it.
I just checked my olive Rogue and that one is completely empty like yours. So I have no idea what it's suppose to have? My Olive Rogue is older than my Felix Rogue.No, it's completely empty. I tried to take a picture but I pretty much have to pry it open to show the inside... Can't do it with one hand!