Version check failed: Your upload included the binary package linux-source-4.9, version 4.9.30-2+deb9u2~bpo8+1, for all, however unstable already has version 4.9.30-2. Uploads to jessie-backports must have a lower version than present in unstable.
binary:i2c-modules-4.9.0-0.bpo.3-armmp-di 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.
