I don’t know; that is for Google to decide.
The easy fix is to create a new AuthID using the Google Docs option, which grants Duplicati full access to all your files.
The slightly harder fix, is to download the file, delete it from Drive, then use the backend tool to re-upload it:
Duplicati.CommandLine.BackendTool.exe PUT googledrive://folder?authid=<original auth id> <filename>
A third option is to just delete it, and then use purge-broken-files to get the backup in shape again.