Comment 3 for bug 1310297

I can confirm that with Ubuntu 17.10 it's still possible to get this error and there is not a way to mitigate it.

I triggered it by trying to workaround another bug in Deja Dup-- https://bugs.launchpad.net/duplicity/+bug/1642544

My temporary solution was to run some manual backups directly with "duplicity". I guess I ended using different source setting, which then triggered this condition when trying "Deja Dup" again.