Quick Query re Callisto Protocol

Can’t seem to post in the sub and last activity there was 300 days ago. I had a quick query. I missed going to the first secret room and now I’m way into the game. Is it possible to load a previous save in order to explore it, then load a later save to continue with the game from the point I’ve reached ?

I didn’t want to load the old save and lose the ability to return to my furthest point.