Conform / Timeline changed by itself!!!

I've got a feature I just finished. I added the credits at the end. A day later I opened the project again and now there are like 20-30 shots in the timeline that got replaced with the credits media instead of the shot media.

What?!

Anyone able to help out and let me know what happened? Is there any way to fix this without going shot by shot? How can this be avoided in the future?

Thanks.

Latest Resolve 15 on Windows 10.

go back to the last good DRP, the one you took 60 seconds to make before adding creditz?

seems like a disk might have gone offline, and Resolve chose media with matching timecode when it could not locate the media? any chance those were on a drive that is now off-line?

other than that, yea conflict resolution should sort it - if the media is still accessable to Resolve