17b6 aborted when trying to save project changes

I was editing a timeline when an attempted save turned into a beachball and then further degraded into an error message saying "Project Cannot be saved...do you want to save changes to a new project?"

Sure, I thought.

Alas, Resolve then reported it could not do that either, and after a little more back-and-forth, I decided to abort, pick up the log, and report here. This directory in my Dropbox has the project file, log, and system report from the iMacPro I'm using.

Fundamentally, what I was doing when it all went to pieces was adding keyframes to one of my clips in timeline 8.

https://www.dropbox.com/sh/ehztcxk9f9jv ... nexwa?dl=0