How can I properly downgrade from MySQL 8 to 5.7 on Ubuntu 20.04

I’ve been trying to install MySQL 5.7 on my Ubuntu 20.04 Droplet and I get an error when launching mysql community server and I get stucked there.

These are the steps I followed:

As my current mysql installation has not previews packages I did:

1. Unistall MySQL

service mysql stop sudo apt-get remove --purge mysql* sudo apt-get purge mysql* sudo apt autoremove && sudo apt autoclean sudo apt-get remove dbconfig-mysql 

2. Download package

sudo apt-get dist-upgrade cd /tmp curl -OL https://dev.mysql.com/get/mysql-apt-config_0.8.13-1_all.deb sudo dpkg -i mysql-apt-config_0.8.13-1_all.deb 

3. Select my desired version and Enable Previews Packages

4. Start Installation

sudo apt-get update sudo apt-cache policy mysql-server sudo apt install -f mysql-client=5.7.32-1ubuntu18.04 mysql-community-server=5.7.32-1ubuntu18.04 mysql-server=5.7.32-1ubuntu18.04 

And then something fails and it cannot start the server:

Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libmecab2 libtinfo5 mysql-common mysql-community-client The following NEW packages will be installed: libmecab2 libtinfo5 mysql-client mysql-common mysql-community-client mysql-community-server mysql-server 0 upgraded, 7 newly installed, 0 to remove and 1 not upgraded. Need to get 51.2 MB of archives. After this operation, 315 MB of additional disk space will be used. Do you want to continue? [Y/n] y Get:1 http://mirrors.digitalocean.com/ubuntu focal/main amd64 mysql-common all 5.8+1.0.5ubuntu2 [7496 B] Get:2 http://mirrors.digitalocean.com/ubuntu focal/universe amd64 libtinfo5 amd64 6.2-0ubuntu2 [83.0 kB] Get:3 http://mirrors.digitalocean.com/ubuntu focal/main amd64 libmecab2 amd64 0.996-10build1 [233 kB] Get:4 http://repo.mysql.com/apt/ubuntu bionic/mysql-5.7 amd64 mysql-community-client amd64 5.7.32-1ubuntu18.04 [14.4 MB] Get:5 http://repo.mysql.com/apt/ubuntu bionic/mysql-5.7 amd64 mysql-client amd64 5.7.32-1ubuntu18.04 [67.2 kB] Get:6 http://repo.mysql.com/apt/ubuntu bionic/mysql-5.7 amd64 mysql-community-server amd64 5.7.32-1ubuntu18.04 [36.4 MB] Get:7 http://repo.mysql.com/apt/ubuntu bionic/mysql-5.7 amd64 mysql-server amd64 5.7.32-1ubuntu18.04 [67.2 kB] Fetched 51.2 MB in 5s (10.5 MB/s) Preconfiguring packages ... Selecting previously unselected package mysql-common. (Reading database ... 120955 files and directories currently installed.) Preparing to unpack .../0-mysql-common_5.8+1.0.5ubuntu2_all.deb ... Unpacking mysql-common (5.8+1.0.5ubuntu2) ... Selecting previously unselected package libtinfo5:amd64. Preparing to unpack .../1-libtinfo5_6.2-0ubuntu2_amd64.deb ... Unpacking libtinfo5:amd64 (6.2-0ubuntu2) ... Selecting previously unselected package mysql-community-client. Preparing to unpack .../2-mysql-community-client_5.7.32-1ubuntu18.04_amd64.deb ... Unpacking mysql-community-client (5.7.32-1ubuntu18.04) ... Selecting previously unselected package mysql-client. Preparing to unpack .../3-mysql-client_5.7.32-1ubuntu18.04_amd64.deb ... Unpacking mysql-client (5.7.32-1ubuntu18.04) ... Selecting previously unselected package libmecab2:amd64. Preparing to unpack .../4-libmecab2_0.996-10build1_amd64.deb ... Unpacking libmecab2:amd64 (0.996-10build1) ... Selecting previously unselected package mysql-community-server. Preparing to unpack .../5-mysql-community-server_5.7.32-1ubuntu18.04_amd64.deb ... Unpacking mysql-community-server (5.7.32-1ubuntu18.04) ... Selecting previously unselected package mysql-server. Preparing to unpack .../6-mysql-server_5.7.32-1ubuntu18.04_amd64.deb ... Unpacking mysql-server (5.7.32-1ubuntu18.04) ... Setting up libmecab2:amd64 (0.996-10build1) ... Setting up mysql-common (5.8+1.0.5ubuntu2) ... update-alternatives: using /etc/mysql/my.cnf.fallback to provide /etc/mysql/my.cnf (my.cnf) in auto mode Setting up libtinfo5:amd64 (6.2-0ubuntu2) ... Setting up mysql-community-client (5.7.32-1ubuntu18.04) ... Setting up mysql-client (5.7.32-1ubuntu18.04) ... Setting up mysql-community-server (5.7.32-1ubuntu18.04) ... update-alternatives: using /etc/mysql/mysql.cnf to provide /etc/mysql/my.cnf (my.cnf) in auto mode Created symlink /etc/systemd/system/multi-user.target.wants/mysql.service → /lib/systemd/system/mysql.service. Job for mysql.service failed because the control process exited with error code. See "systemctl status mysql.service" and "journalctl -xe" for details. invoke-rc.d: initscript mysql, action "start" failed. ● mysql.service - MySQL Community Server Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled) Active: activating (auto-restart) (Result: exit-code) since Wed 2020-11-25 06:24:48 -05; 8ms ago Process: 15083 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS) Process: 15132 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid (code=exited, status=1/FAILURE) Nov 25 06:24:48 FoxyWD-VPS-2 systemd[1]: mysql.service: Control process exited, code=exited, status=1/FAILURE Nov 25 06:24:48 FoxyWD-VPS-2 systemd[1]: mysql.service: Failed with result 'exit-code'. Nov 25 06:24:48 FoxyWD-VPS-2 systemd[1]: Failed to start MySQL Community Server. Nov 25 06:24:48 FoxyWD-VPS-2 systemd[1]: mysql.service: Scheduled restart job, restart counter is at 1. Nov 25 06:24:48 FoxyWD-VPS-2 systemd[1]: Stopped MySQL Community Server. Nov 25 06:24:48 FoxyWD-VPS-2 systemd[1]: Starting MySQL Community Server... dpkg: error processing package mysql-community-server (--configure): installed mysql-community-server package post-installation script subprocess returned error exit status 1 dpkg: dependency problems prevent configuration of mysql-server: mysql-server depends on mysql-community-server (= 5.7.32-1ubuntu18.04); however: Package mysql-community-server is not configured yet. dpkg: error processing package mysql-server (--configure): dependency problems - leaving unconfigured Processing triggers for systemd (245.4-4ubuntu3.3) ... No apport report written because the error message indicates its a followup error from a previous failure. Processing triggers for man-db (2.9.1-1) ... Processing triggers for libc-bin (2.31-0ubuntu9.1) ... Errors were encountered while processing: mysql-community-server mysql-server E: Sub-process /usr/bin/dpkg returned an error code (1) 

Any help on how to downgrade my mysql?

Thanks

Carlos C.