Hmm, doing some LST, eh?
Something came along and eat it off.....no biggie. The next 2 lower node points will take over as the main shoot(s)...
This is simply what people do when "topping" earlier in the plants life. You remove the "top" and the next 2 lower points get the hormones that make them think they are the "main" top......FIMing tends to spread this hormone even farther down then simply the next 2.....I top for 4 mains and LST them....sometimes super cropping comes into play if they get a bit tall.
Plan now on supporting those new "mains" as they will need it at the plants height now.
BTW, I love your smile in the avatar.