Hello @rv6834 and welcome to the Duplicati forum! Unfortunately duplicity is a different program, so I’m not sure how much I can help. How and when does the message occur? Is Duplicati involved somehow?
About all I can say from looking at a /usr/lib/python2.7/dist-packages/duplicity/backends/giobackend.py is:
5 # This file is part of duplicity.
...
91 loop.run() # halt program until we're done mounting
92
93 # Now make the directory if it doesn't exist
94 try:
95 self.remote_file.make_directory_with_parents(None)
96 except GLib.GError as e:
97 if e.code != Gio.IOErrorEnum.EXISTS:
98 raise