Have to redo all of odst to continue

i was playing odst from the start the other day, and when i came back to it i started from a different mision (did not resume). now the checklist showing what i am doing has 1 thing on it (search kikowani station for a team mate), meaning i cant go into the underground tunnels

is there a way i can bypass doing everything again?

Unfortunately no. But think of it this way: you get to replay the entire campaign and you know the secrets you now know to beat it quicker. Test yourself and see if you can do something crazy you couldn’t do at first…