Cannot upgrade to MySQL 8 from 5.7

Question

I'm trying to update MySQL to the latest version, actually I have the version 5.7, what I did is the following:

1. Downloaded the package:

wget https://repo.mysql.com//mysql-apt-config_0.8.10-1_all.deb
sudo dpkg -i mysql-apt-config_0.8.10-1_all.deb

then I choosed this:

later I seelcted MySQL 8.0 and finally this:

2.Update

Then I run the following commands:

sudo apt-get update
sudo apt-get install mysql-server

3. Version Checking:

So I checked the current version using apt policy mysql-server

and this return:

These are some logs during the update:

What I did wrong?

Output of cat /etc/apt/sources.list.d/mysql.list:

deb http://repo.mysql.com/apt/ubuntu/ bionic mysql-apt-config
deb http://repo.mysql.com/apt/ubuntu/ bionic mysql-8.0
deb http://repo.mysql.com/apt/ubuntu/ bionic mysql-tools
#deb http://repo.mysql.com/apt/ubuntu/ bionic mysql-tools-preview
deb-src http://repo.mysql.com/apt/ubuntu/ bionic mysql-8.0