Well,, sadly, there's not much you can do about it now mate, you're in the height of pre flower. I do see you have space in your tent. That's a big girl in the back left. Id suggest you move that into the center of the light or move you light back, as all your plants look like they're at the back & side no? Generally rotating them is a good idea. After the stretch is over. Go ahead and defol. But, not now. Not on an auto in pre flower.