CentOS 7.2-1511으로 패키지 그룹(Available Groups) 마리아 데이터베이스 서버(MariaDB Database Server) 설치가 안됩니다.

CentOS 7.2-1511에 패키지 그룹(Available Groups) 마리아 데이터베이스 서버(MariaDB Database Server) 설치를 하려고 하는데, 설치가 안됩니다.
제가 영어를 잘 모르고, 뭐가 문제인지 모르겠습니다.
설마... 의존성 문제 일까요? -_-;;

[root@localhost ~]# yum -y groupinstall "MariaDB Database Server"
Loaded plugins: fastestmirror, langpacks
There is no installed groups file.
Maybe run: yum groups mark convert (see man yum)
Loading mirror speeds from cached hostfile
* network: mirrors.kernel.org
Resolving Dependencies
--> Running transaction check
---> Package mariadb-server.x86_64 1:5.5.44-2.el7.centos will be installed
--> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.44-2.el7.centos for package: 1:mariadb-server-5.5.44-2.el7.centos.x86_64
--> Processing Dependency: mariadb(x86-64) = 1:5.5.44-2.el7.centos for package: 1:mariadb-server-5.5.44-2.el7.centos.x86_64
--> Processing Dependency: perl-DBD-MySQL for package: 1:mariadb-server-5.5.44-2.el7.centos.x86_64
--> Running transaction check
---> Package mariadb.x86_64 1:5.5.44-2.el7.centos will be installed
--> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.44-2.el7.centos for package: 1:mariadb-5.5.44-2.el7.centos.x86_64
---> Package mariadb-server.x86_64 1:5.5.44-2.el7.centos will be installed
--> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.44-2.el7.centos for package: 1:mariadb-server-5.5.44-2.el7.centos.x86_64
---> Package perl-DBD-MySQL.x86_64 0:4.023-5.el7 will be installed
--> Finished Dependency Resolution
Error: Package: 1:mariadb-server-5.5.44-2.el7.centos.x86_64 (dvd)
Requires: mariadb-libs(x86-64) = 1:5.5.44-2.el7.centos
Installed: 1:mariadb-libs-5.5.47-1.el7_2.x86_64 (@updates)
mariadb-libs(x86-64) = 1:5.5.47-1.el7_2
Available: 1:mariadb-libs-5.5.44-2.el7.centos.x86_64 (dvd)
mariadb-libs(x86-64) = 1:5.5.44-2.el7.centos
Error: Package: 1:mariadb-5.5.44-2.el7.centos.x86_64 (dvd)
Requires: mariadb-libs(x86-64) = 1:5.5.44-2.el7.centos
Installed: 1:mariadb-libs-5.5.47-1.el7_2.x86_64 (@updates)
mariadb-libs(x86-64) = 1:5.5.47-1.el7_2
Available: 1:mariadb-libs-5.5.44-2.el7.centos.x86_64 (dvd)
mariadb-libs(x86-64) = 1:5.5.44-2.el7.centos
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

참고1. CentOS 7.2-1511에 패키지 그룹 마리아 데이터베이스 서버(MariaDB Database Server) 설치하기 전에 다음과 같이 설정을 하였습니다.

yum 명령어 실행 시 CentOS 7 DVD를 우선 사용해서 설치하고, DVD에 패키지 파일이 없을 경우에는 네트워크에서 다운로드해 설치하도록 설정

[root@localhost yum.repos.d]# pwd
/etc/yum.repos.d
[root@localhost yum.repos.d]# cat dvd.repo

[dvd]
name=CentOS DVD
baseurl=file:///media/cdrom/
gpgcheck=0

[network]
name=Network
baseurl=
http://mirrors.kernel.org/centos/7.2.1511/os/x86_64/
http://mirror.centos.org/centos/7.2.1511/os/x86_64/
gpgcheck=0

[dvd]
name=CentOS DVD
baseurl=file:///media/cdrom/
gpgcheck=0

[network]
name=Network
baseurl=
http://mirrors.kernel.org/centos/7.2.1511/os/x86_64/
http://mirror.centos.org/centos/7.2.1511/os/x86_64/
gpgcheck=0

참고2. CentOS 운영체제를 업데이트를 다해놓은 상태입니다.(yum -y update 실행)

아시는분 답변 바랍니다.