What does Al's dream mean?

Perrín Aloro had a weird dream in the night of Ches 3-4. Al talking to Stockmun Cay about it: "I... had a dream tonight. A very weird dream. In this dream, it was made clear that some could not be trusted. I don't know who it was about, but I think your dagger was in that dream as well. So, I trust you and I don't think the dream was about you being untrustworthy. But maybe it was about the former owner of that dagger. I believe it is important." Does it mean anything?