"_____'s Spirit is Fading Away" Message. What is this?

Interesting. I haven't had this message yet. But it does make me worry for Cameron's ghost on my vampire lot. I was worried about him before, but now more so. With all the other ghosts, culling is fine by me...it actually answers something I was asking for in another discussion. So long as I get to keep Cameron, I don't mind if the others go. I may need to find a way to resurrect him :/

But I haven't had the message yet so O.o. I guess we'll see what transpires. I have had five generations of humans so it might well be a flood of messages when it finally comes...