Symptoms
During MariaDB pre-upgrade check via Plesk interface, the following warning appears:
The following package manager configuration files contain options that may result in an upgrade failure:
/etc/yum.repos.d/filename.repo
To proceed with the upgrade, comment out or remove the following options:
exclude, excludepkgs, includepkgs, installonlypkgs, tsflags.
Cause
Some of the options mentioned in the warning message are set in the specified repository file