To fix this bug, a Debian Developer will need to do a binary upload of this package. Once the package makes it through the NEW queue, then you can follow the final step in the final link of https://lintian.debian.org/tags/source-only-upload-to-non-free-without-autobuild.html
After all that has been done, you can do a source-only upload off assaultcube-data. Thanks, Jeremy
