rm /etc/pve/local/pveproxy-ssl.pem
rm /etc/pve/local/pveproxy-ssl.key
pvecm updatecerts --force
systemctl restart pveproxy
systemctl stop pve-cluster corosync
pmxcfs -l
rm /etc/corosync/*
rm /etc/pve/corosync.conf
killall pmxcfs
systemctl start pve-cluster