Reschedule workout in calendar

I am on day 8 of a program, but I missed the weekend and need to reschedule my workout days two days in advance. When I try to reschedule, I get the error that I can't because I already have another workout scheduled for the date I'm trying to move to. I was hoping if I reschedule the workout I missed to today, it would move the rest of the workouts with it, but this isn't happening. I don't want to go back through and move each workout two days forward manually. Am I missing something?