High phosphate in urine means your blood has more phosphate & is being filtered by healthy kidneys. But if kidneys are malfunctioning, blood phosphate levels will rise & are harmful. Simple solution: Avoid phosphate contains foods like nuts, lentils, dairy foods, ice tea, bran cereals oats, beans. Automatically urinary phosphorus will come down to normal range. Not a big problem.

just repeat the test again after 2 weeks