If you have problrem....
ouch '/please-remove-proxmox-ve'
apt update
apt -y full-upgrade
systemctl status pveproxy pvedaemon
systemctl restart pveproxy pvedaemon
apt-get install proxmox-ve
apt update
apt -y upgrade
apt -y autoremove
apt install -f
apt install pve-manager
dpkg -l | grep pve*
mkdir /usr/share/proxmox-ve
nano /usr/share/proxmox-ve/pve-apt-hook
chmod u+x /usr/share/proxmox-ve/pve-apt-hook
apt install proxmox-ve
apt update
apt -y upgrade
apt -y autoremove
apt install -f
apt install -y pve-manager
apt clean && apt update && apt -y dist-upgrade
nano /etc/apt/sources.list
###########################################################################
deb
http://ftp.it.debian.org/debian bullseye main contrib
deb
http://ftp.it.debian.org/debian bullseye-updates main contrib
# security updates
deb
http://security.debian.org bullseye-security main contrib
# Repository PVE pve-no-subscription fornito da proxmox.com,
# NON consigliato per l'uso in produzione
deb
http://download.proxmox.com/debian/pve bullseye pve-no-subscription
###########################################################################
apt clean && apt update && apt -y dist-upgrade
apt install -y pve-manager