I found a few topics with this error included, but not results.
I have several files that ended up with this error (the 1KB file with the above message embedded).
While I understand the reasoning for the error - what is the best way to "resync" the files now?
This occurred when restoring about 400GB of files from Drive back to my local drive through syncdocs.
About 2% of the files ended up like this.
I've been waiting a few months actually, hoping it would fix itself - but it hasn't :)
I finally decided to research what is up and ended up here.
Thanks for the help! I'm sure others will be in this boat.