Установите MySQL 5.7
sudo apt install -f mysql-client=5.7* mysql-community-server=5.7* mysql-server=5.7*
Red Team
sudo apt install -f mysql-client=5.7* mysql-community-server=5.7* mysql-server=5.7*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