Warning: "Metadata was reported as not changed, but still requires being added"

This is part of a larger backup, and these errors, while concentrated on virtualbox, happen even when it hasn’t been run during the backup.

I forget, is there a way to get duplicati to use a file system snapshot on Linux the way it can on Windows? If so, does it matter what filesystem is being used?

Also, where can I get a very of 2.0.5.107 canary at this point?

Thanks!