Wet your fingers and carefully pluck those boys off. Don’t break the sacs! Water will help stop pollen, if you notice sacs breaking, but be careful to avoid soaking buds.
One grow of bag seed, I had 6 hermies. With vigilance, I got away from that grow with only one or two seedy buds. By vigilance, I mean checking daily, top to bottom, for new balls. It’s a pain, but it’s worth it. At the end, you still might get a nanner that pops up, but usually so late in the grow that it doesn’t really affect anything. Don’t try plucking them off, unless you’re at a stage in flower where you can spray the area with water; they spread pollen w/o having to break open.