mysqlをアップグレードするとパッケージが破損する

私はDebian JessieとMySQL 5.6を持っています。MySQL Debianリポジトリ。このインストールでは、aptsources.list.dエントリをインストールしてからsudo apt-get install mysql-community-serverMySQL 5.6または5.7をインストールするかどうかを尋ねます。

この設定は数ヶ月間実行されました。

今日一つ作ったのにsudo apt-get update && sudo apt-get upgrade葛藤ができました。私が得るものは次のとおりです。

Duplicate sources.list entry http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 amd64 Packages (/var/lib/apt/lists/repo.mysql.com_apt__debian_dists_jessie_mysql-5.6_binary-amd64_Packages)
Duplicate sources.list entry http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 i386 Packages (/var/lib/apt/lists/repo.mysql.com_apt__debian_dists_jessie_mysql-5.6_binary-i386_Packages)
You may want to run apt-get update to correct these problems
Reading package lists... Done
W: Duplicate sources.list entry http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 amd64 Packages (/var/lib/apt/lists/repo.mysql.com_apt__debian_dists_jessie_mysql-5.6_binary-amd64_Packages)
W: Duplicate sources.list entry http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 i386 Packages (/var/lib/apt/lists/repo.mysql.com_apt__debian_dists_jessie_mysql-5.6_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libmysqlclient18 : Depends: mysql-common (>= 5.7.5-m15-2debian8)
 mysql-community-client : Depends: mysql-common (= 5.7.12-1debian8)
E: Broken packages

MySQL 5.7を選択していないので、これは奇妙です！なぜこれを求めるのですか？ MySQL aptエントリを見ると、/etc/apt/sources.list.d/mysql.list次のようになります。

### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out entries below, but any other modifications may be lost.
# Use command 'dpkg-reconfigure mysql-apt-config' as root for modifications.
deb http://repo.mysql.com/apt//debian/ jessie mysql-apt-config
deb http://repo.mysql.com/apt//debian/ jessie mysql-5.6
deb http://repo.mysql.com/apt//debian/ jessie mysql-5.6 mysql-5.7-dmr mysql-5.7 connector-python-2.0 connector-python-2.1 router-2.0 mysql-utilities-1.5 mysql-tools    
deb-src http://repo.mysql.com/apt//debian/ jessie mysql-5.6

5.7がどこから来たのか、そこで見るのが正しいか理解できません。

また、Repair Apt Entryを試してみましたが、sudo dpkg-reconfigure mysql-apt-config役に立ちませんでした。

破損したパッケージを修正する方法についてのアイデアはありますか？

編集する：

コメントでリクエスト：

$ apt-cache policy mysql-common libmysqlclient18 mysql-community-client
mysql-common:
  Installed: 5.6.30-1debian8
  Candidate: 5.7.12-1debian8
  Version table:
     5.7.12-1debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.7 amd64 Packages
     5.7.8-rc-1debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.7-dmr amd64 Packages
 *** 5.6.30-1debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 amd64 Packages
        100 /var/lib/dpkg/status
     5.5.47-0+deb8u1 0
        500 http://security.debian.org/ jessie/updates/main amd64 Packages
        500 http://httpredir.debian.org/debian/ stable/main amd64 Packages
libmysqlclient18:
  Installed: 5.6.30-1debian8
  Candidate: 5.7.5-m15-2debian8
  Version table:
     5.7.5-m15-2debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.7-dmr amd64 Packages
 *** 5.6.30-1debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 amd64 Packages
        100 /var/lib/dpkg/status
     5.5.47-0+deb8u1 0
        500 http://security.debian.org/ jessie/updates/main amd64 Packages
        500 http://httpredir.debian.org/debian/ stable/main amd64 Packages
mysql-community-client:
  Installed: 5.6.30-1debian8
  Candidate: 5.7.12-1debian8
  Version table:
     5.7.12-1debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.7 amd64 Packages
     5.7.8-rc-1debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.7-dmr amd64 Packages
 *** 5.6.30-1debian8 0
        500 http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 amd64 Packages
        100 /var/lib/dpkg/status
W: Duplicate sources.list entry http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 amd64 Packages (/var/lib/apt/lists/repo.mysql.com_apt__debian_dists_jessie_mysql-5.6_binary-amd64_Packages)
W: Duplicate sources.list entry http://repo.mysql.com/apt//debian/ jessie/mysql-5.6 i386 Packages (/var/lib/apt/lists/repo.mysql.com_apt__debian_dists_jessie_mysql-5.6_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems