When re-uploading an unmodified .changes file (e.g. after upload permissions
got fixed), dput rejects the upload with this message:

This message made me think that the upload had been rejected server-side, but I
eventually got the hint that it is possible to force the re-upload with the
`-f` / `--force` parameter. A different wording would probably help to
understand this easier (or at least know that the `--force` parameter is
available).

A suggestion would be something like:

It does not tell explicitly that the upload is blocked by the local machine and
not the server, but at least it gives some hint where to continue.