Error: Unable to find a match: centos-release-openstack-queens code example

Example: Error: Unable to find a match: centos-release-openstack-queens

sudo yum install -y https://rdoproject.org/repos/rdo-release.rpm

sudo yum install centos-release-openstack-stein
sudo yum-config-manager --enable openstack-stein
sudo yum update
sudo yum install -y openstack-packstack