Tds on partly interest on unsecured loan

sir plz clear me that i will deduct tds on rs 10000000 in f.y. 2017-18 as the interest on unsecured loan exceeds rs 5000 but i donot deduct tds on interest on some amount of additional loan which i have taken on march 2018 as interest on this additional loan does not exceeds of rs 5000 in f.y. 2017-18... Am i right sir??? plz reply me