Queue closed activity

Is it feasible to queue complete/closed task on the process monitoring page. For example assume process executed  4 automated activity (A1, A2, A3, A4) and waiting on human task (H1), now is it feasible to queue back to A1.  If I introduce a new activity A0 and publish then i can find all the existing instances get A0 to queue up.  Just checking if not possible with service center then are there ways with the API to queue back to the previous completed tasks.