Issue Failed Mysql Upgrade from 5.5.56 to 5.6 or 5.7

[AllenTeng]

I follow this post "How to upgrade MySQL 5.5 to 5.6/5.7 or MariaDB 5.5 to 10.0/10.1/10.2 on Linux" to upgrade Mysql from 5.5 to 5.6.

Then met error as bellow while ran this command "yum install mariadb".
"Error: Package: plesk-mysql-server-17.8.11-cos7.build1708180301.19.x86_64 (@PLESK_17_8_11-dist) Requires: mariadb-server >= 5.0.60
Removing: 1:mariadb-server-5.5.56-2.el7.x86_64 (@base)
mariadb-server = 1:5.5.56-2.el7
Obsoleted By: mysql-community-server-5.6.40-2.el7.x86_64 (mysql56-community) Not found
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest"

What did I wrong and how to fix it?

 

[MarkM]

You say you're trying to upgrade from MySQL 5.5 to 5.6 but installing a MariaDB package....