Version check failed: Your upload included the binary package gnumach-common, version 2:1.8+git20171101-1, for all, however testing already has version 2:1.8+git20171101-1. Uploads to unstable must have a higher version than present in testing.
binary:gnumach-common is NEW. === Please feel free to respond to this email if you don't understand why your files were rejected, or if you upload new files which address our concerns.