Comments - Get Error When Updating Software On Ubuntu 18.04.4 LTS
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There probably an issue with an old install of a related product. Backup any databases you have. Try purging all MySQL and MariaDB related packages, removing all third party apt repositories from /etc/apt/sources.list and /etc/apt/sources.list.d and then reinstalling MySQL from the official Ubuntu repositories again.
$ sudo apt-get remove --purge mysql-server mysql-client mysql-common -y $ sudo apt-get remove --purge mariadb-server $ sudo apt-get autoremove -y $ sudo apt-get autoclean