2016 WalMart Exclusive HW Garage '67 Custom Mustang

2016 WalMart Exclusive HW Garage \'67 Custom Mustang
This is the Hot Wheels 2016 HW Garage Series '67 Custom Mustang. It was only found at Wal-Mart stores! Mint on, mint card!
1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'hwstangs_osc.o.date_purchased' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

select p.products_id, p.products_image from orders_products opa, orders_products opb, orders o, products p where opa.products_id = '31' and opa.orders_id = opb.orders_id and opb.products_id != '31' and opb.products_id = p.products_id and opb.orders_id = o.orders_id and p.products_status = '1' group by p.products_id order by o.date_purchased desc limit 6