Error updating thread fixed.

brewman/brewman/views/messaging.py

@@ -107,7 +107,7 @@ def update(request):
         if subscriber.user.name not in newSubscribers:
             thread.subscribers.remove(subscriber)
         else:
-            newSubscribers.remove(subscriber.name)
+            newSubscribers.remove(subscriber.user.name)
             subscriber.read = False
     for j in newSubscribers:
         subscriber = Subscriber(user_id=User.by_name(j).id, read=False)