Uploading a file which was already uploaded earlier results in the 'another file'-warning. (c.f. https://bugzilla.wikimedia.org/attachment.cgi?id=11445&action=edit )
However the link in this warning does _not_ link to the previously deleted or uploaded duplicate.
Version: unspecified
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=46741
https://bugzilla.wikimedia.org/show_bug.cgi?id=70639