Just thought I should report this when exiting the centminmod menu: Code (Text): Following Updates are available: ------------------------------------------------------------- http://yum.mariadb.org/10.1/centos7-amd64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found Trying other mirror. To address this issue please refer to the below wiki article https://wiki.centos.org/yum-errors If above article doesn't help to resolve this issue please use https://bugs.centos.org/.
Are you still on MariaDB 10.1 ? If you are might need to manually change the mariadb.repo file as outlined at https://community.centminmod.com/threads/downgrading-mariadb.22134/#post-92639