Files in finder/explorer doesn't correspound with audio


I am editing a podcast episode (which I have done countless times before) in Cubase 8.

Almost finished it last night and shut it down and went to sleep. But today… the cuts are all in the right places but the audio files doesn’t correspond with what I heard yesterday.

How can I resync this?

For example a track of an interview sounded fine yesterday, but today it is edited in the same way but the sound that is playing back comes from a different file.

I suppose there is an easy fix for this, and that I do not have to re-edit the whole thing, but how do I solve this?

Best, Ben