The role was X, now it is Z. It should be common sense and common politeness to advise all current applicants of a major change of the advertised role, its skill set and experience. And to re-advertise the role with its new brief. Alas, this is seldom done. Few if any of those who applied for the old role can fit the new role, and are destined to failure. An unsatisfactory and demeaning situation all round. Please change this practice.