error update from 9.4.5 to 9.5.1

yum install gitlab-ce and get error Checking PostgreSQL executables:/opt/gitlab/embedded/lib/ruby/site_ruby/2.3.0/rubygems/specification.rb:2278:in `check_version_conflict': can't activate net-ssh-4.1.0, already activated net-ssh-3.2.0 (Gem::LoadError)