With mapillary_tools, when there are failed uploads, it prompts:
Retry uploading previously failed image uploads? [y/n]
Answering “n” still seems to retry, as it currently ends up with a 404 exception, for example:
requests.exceptions.HTTPError: 404 Client Error: Not Found for url: https://a.mapillary.com/v3/me/uploads/AOL9sq6R0v5A2n0hmTwGsG/closed?client_id=…