INSERT INTO prices (price, product_id)
SELECT
product_price, commn_id
FROM products_temp as prod
WHERE NOT EXISTS
(SELECT *
   FROM   prices od
   WHERE  prod.commn_id = od.product_id)
OR prod.product_price !=
( SELECT price
  FROM prices as p
  WHERE p.product_id = prod.commn_id
  order by p.end
  desc LIMIT 1 )

OR prod.product_price !=
( SELECT price
  FROM prices as p
  WHERE p.product_id = prod.commn_id
  order by p.end
  desc LIMIT 1 )