我目前遇到了与 Debian Jessie 的依赖问题，这是由于启用了测试存储库的系统升级导致的。有没有安全的方法可以恢复到以前的配置？
不确定测试存储库的实际配置原因，因为这是由前任服务器管理员进行的。更新也是由他编写的 Ansible 脚本执行的。当我禁用源时，输入以下内容时会得到一个巨大的列表：
apt-show-versions | grep “存档中没有可用的版本”
这只是一部分：
aspell-de-1901:all 1:2-31 installed: No available version in archive
coinor-libcoinmp1v5:amd64 1.7.6+dfsg1-2 installed: No available version in archive
coinor-libcoinutils3v5:amd64 2.9.15-4 installed: No available version in archive
coinor-libosi1v5:amd64 0.106.9-2+b1 installed: No available version in archive
cpp-6:amd64 6.4.0-1 installed: No available version in archive
default-java-plugin:amd64 2:1.8-59 installed: No available version in archive
fonts-droid-fallback:all 1:6.0.1r16-1.1 installed: No available version in archive
fonts-noto-mono:all 20161116-1 installed: No available version in archive
g++-6:amd64 6.4.0-1 installed: No available version in archive
galera-3:amd64 25.3.20-1 installed: No available version in archive
gcc-6:amd64 6.4.0-1 installed: No available version in archive
gcc-6-base:amd64 6.4.0-1 installed: No available version in archive
gcc-7-base:amd64 7.1.0-9 installed: No available version in archive
gcj-6-jre-lib:all 6.4.0-1 installed: No available version in archive
gnupg-l10n:all 2.1.18-8 installed: No available version in archive
gnupg2:all 2.1.18-8 installed: No available version in archive
gtk-update-icon-cache:amd64 3.22.16-1 installed: No available version in archive
icedtea-8-plugin:amd64 1.6.2-3.1 installed: No available version in archive
initramfs-tools-core:all 0.130 installed: No available version in archive
laptop-detect:all 0.15 installed: No available version in archive
libapt-inst2.0:amd64 1.5~beta1 installed: No available version in archive
libapt-pkg5.0:amd64 1.5~beta1 installed: No available version in archive
libarchive-cpio-perl:all 0.10-1 installed: No available version in archive
libasan3:amd64 6.4.0-1 installed: No available version in archive
libasprintf0v5:amd64 0.19.8.1-2+b1 installed: No available version in archive
任何帮助都值得赞赏，
谢谢
编辑：
/etc/apt/sources.list：
# deb http://ftp.de.debian.org/debian/ jessie main
deb http://ftp.de.debian.org/debian/ jessie main
deb-src http://ftp.de.debian.org/debian/ jessie main
deb http://security.debian.org/ jessie/updates main
deb-src http://security.debian.org/ jessie/updates main
# jessie-updates, previously known as 'volatile'
deb http://ftp.de.debian.org/debian/ jessie-updates main
deb-src http://ftp.de.debian.org/debian/ jessie-updates main
“tail /etc/apt/sources.list.d/*” 的输出：
==> /etc/apt/sources.list.d/ansible.list <==
deb http://ppa.launchpad.net/ansible/ansible/ubuntu trusty main
==> /etc/apt/sources.list.d/backports.list <==
deb http://ftp.debian.org/debian jessie-backports main
==> /etc/apt/sources.list.d/bloonix.list <==
deb https://download.bloonix.de/repos/debian/ jessie main
==> /etc/apt/sources.list.d/dotdeb.list <==
deb http://packages.dotdeb.org jessie all
==> /etc/apt/sources.list.d/draios.list <==
#deb http://download.draios.com/stable/deb stable-$(ARCH)/
==> /etc/apt/sources.list.d/elasticsearch-2.x.list <==
deb http://packages.elastic.co/elasticsearch/2.x/debian stable main
==> /etc/apt/sources.list.d/git-lfs.list <==
deb https://packagecloud.io/github/git-lfs/debian/ jessie main
==> /etc/apt/sources.list.d/testing.list <==
deb http://ftp.debian.org/debian testing main non-free contrib