Nursing less due to eating solids

My son is almost 8 months old and started eating purees at 6 months. He loves food. He'll scream and open his mouth as soon as we sit him in his high chair. I always nurse him about 30-60 minutes before he eats but he doesnt nurse much. He used to be at the breast for at least 10 minutes every 3 hours during the day and now he barely nurses for 5 minutes sometimes only a minute. I really want to breastfeed him for at least a year and I know most of his calories should still be coming from breastmilk. Should I be worried? Should I cut back on solids so he nurses more?