Cubase Not Saving OVER File - Creates NEW Instead

Quick update - I came across someone having the exact issue and it appears to be a problem with Dropbox. Has anyone else had this?

Like this chap, my Dropbox folder is my root project folder on my hard drive that I run Cubase projects out of. Will be contacting Dropbox but I don’t expect they’ll be able to give detailed advice on Cubase saving itself