Unable to Upgrad omv 3.x to 4.x

root@openmediavault:~# omv-release-upgrade
Upgrading system to 4.0 (Arrakis) ...




Ign https://download.docker.com stretch/stable Translation-de
Ign http://httpredir.debian.org jessie-backports/main Translation-de
Get:110 https://dl.bintray.com stretch/main Translation-de_DE
Get:111 https://dl.bintray.com stretch/main Translation-de
Ign http://httpredir.debian.org jessie-backports/non-free Translation-en
Get:112 https://dl.bintray.com stretch/main Translation-en
Ign http://httpredir.debian.org jessie-backports/non-free Translation-de_DE
Get:113 https://dl.bintray.com stretch/main Translation-de_DE
Get:114 https://dl.bintray.com stretch/main Translation-de
Get:115 http://ftp.us.debian.org stretch/main Translation-en [5384 kB]
Ign http://httpredir.debian.org jessie-backports/non-free Translation-de
Get:116 https://dl.bintray.com stretch/main Translation-en
Get:117 https://dl.bintray.com stretch/main Translation-de_DE
Get:118 https://dl.bintray.com stretch/main Translation-de
Get:119 https://dl.bintray.com stretch/main Translation-en
Ign https://dl.bintray.com stretch/main Translation-en
Get:120 https://dl.bintray.com stretch/main Translation-de_DE
Ign https://dl.bintray.com stretch/main Translation-de_DE
Get:121 https://dl.bintray.com stretch/main Translation-de
Ign https://dl.bintray.com stretch/main Translation-de
Get:122 https://dl.bintray.com stretch/main Translation-en
Ign https://dl.bintray.com stretch/main Translation-en
Get:123 https://dl.bintray.com stretch/main Translation-de_DE
Ign https://dl.bintray.com stretch/main Translation-de_DE
Get:124 https://dl.bintray.com stretch/main Translation-de
Ign https://dl.bintray.com stretch/main Translation-de
Get:125 https://dl.bintray.com stretch/main Translation-en
Ign https://dl.bintray.com stretch/main Translation-en
Get:126 https://dl.bintray.com stretch/main Translation-de_DE
Ign https://dl.bintray.com stretch/main Translation-de_DE
Get:127 https://dl.bintray.com stretch/main Translation-de
Ign https://dl.bintray.com stretch/main Translation-de
Get:128 https://dl.bintray.com stretch/main Translation-en
Ign https://dl.bintray.com stretch/main Translation-en
Get:129 https://dl.bintray.com stretch/main Translation-de_DE
Ign https://dl.bintray.com stretch/main Translation-de_DE
Get:130 https://dl.bintray.com stretch/main Translation-de
Ign https://dl.bintray.com stretch/main Translation-de
Get:131 http://ftp.us.debian.org stretch/main Translation-de_DE [830 B]
Get:132 http://ftp.us.debian.org stretch/main Translation-de [1620 kB]
Get:133 http://ftp.us.debian.org stretch/non-free Translation-en [80.3 kB]
Fetched 14.4 MB in 5s (2830 kB/s)
W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie-backports/main/binary-amd64/Packages  404  Not Found


W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie-backports/contrib/binary-amd64/Packages  404  Not Found


W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie-backports/non-free/binary-amd64/Packages  404  Not Found


E: Some index files failed to download. They have been ignored, or old ones used instead.