Need help to install MariaDB-11.5.1

Hi
I have failed to yum install MariaDB 11

rpm -qa|grep -i mariadb
MariaDB-common-11.5.1-1.el7.centos.x86_64
MariaDB-server-compat-11.5.1-1.el7.centos.noarch
MariaDB-client-compat-11.5.1-1.el7.centos.noarch
MariaDB-compat-11.5.1-1.el7.centos.x86_64
MariaDB-server-10.4.34-1.el7.centos.x86_64
MariaDB-client-11.5.1-1.el7.centos.x86_64

from the above result, looks like I failed to install MariaDB-11, how to fix this?

my MariaDB.repo is:

[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/11.5.1/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1