This is a stunning (though sadly unsurprising) quality control failure on the part of Virtuozzo / OpenVZ.
Try this on your affected server:
rpm -hUv --force https://download.openvz.org/virtuozzo/releases/openvz-7.0.20-147/x86_64/os/Packages/v/vcmmd-8.0.77-1.vz7.noarch.rpm
After that you may need to restart the vcmmd service.