Check Marks on Days With no Workouts

So I was editing my Calendar on my phone and accidentally removed a program I was 2 workouts shy of completing (started in the last week of Oct). There is no undo option sadly, so I attempted to put the program back but by that time it had already registered my workouts as independent. Painstakingly tried to match the program days with the independent workout days and it was not working as intended so I just checked off the workout days I know I did and removed the independend workouts one at a time. But now my Calendar has check marks on days where there used to be workouts (from when I actually did it) that aren't going away even after removing the independent workouts. Any ideas on how to fix this?

Edited