There was a file by this name, "$1", but it was deleted and you can not reupload the file. If your file is different, try renaming it.
MediaWiki:Mwe-upwiz-api-warning-was-deleted
From R Consortium Wiki
There was a file by this name, "$1", but it was deleted and you can not reupload the file. If your file is different, try renaming it.
