plants 6 week into flower. cut fans?

hey everyone?

i have 2 ak47s growing under a 400W HPS they are 6 weeks into flowering but some of the leaves are turn ing a bit yellow. the fan leaves r blocking the buds from growing. is it okay to cutt them off right now or will it do damage to the plants?

if those leafs are block the bud site just tuck them dont cut them
it could lower the yeild of bud u do get
bu if its like the real lower leafs are turning yellow then ok but at the bud site try to tuck them behind something