WineHQ 7.0 fails to install on Linux Mint 20.3/Ubuntu 20.04 because of conflict with a dependency distributed in the installation package from MariaDB mirrors. The winehq-stable dependency chain runs as follows: winehq-stable->wine-stable->wine-stable-i386->libsane:i386->libsnmp35:i386->libmysqlclient21:i386->mysql-common. mariadb-common also depends on mysql-common, but a different version. I attempted to file a bug report with WineHQ, but they said it was not a bug, but the result of building their install package against packages in the official Ubuntu repository, which are several versions behind those distributed through the MariaDB mirrors. They suggested asking the MariaDB package maintainer to provide a 32-bit mysql-common package to match the 64-bit package. In the meantime I have found a workaround by installing mysql-common 5.8+1.0.5ubuntu2 from the Ubuntu repository. MariaDB seems to still work fine after this downgrade, at least for the tasks I use it for, but I had to put a hold on mysql-common to keep the system from nagging me to upgrade.