Make sure the one-way migration question is always asked when preinstall runs, but only if the same major version has not already been installed.
Make sure the one-way migration question is always asked when preinstall runs, but only if the same major version has not already been installed.

ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0,ottok/mariadb-10.0