Darüber komme ich rein, ist ein Umweg keine Lösung ^^
deb http://ftp.de.debian.org/debian buster main contrib
deb http://ftp.de.debian.org/debian buster-updates main contrib
# security updates
deb http://security.debian.org buster/updates main contrib
deb http://deb.debian.org/debian buster main contrib
deb http://deb.debian.org/debian buster-updates main contrib
# security updates
deb http://security.debian.org buster/updates main contrib
root@prx:~# nano /etc/apt/sources.list
root@prx:~# cat /etc/apt/sources.list.d/pve-enterprise.list
deb https://enterprise.proxmox.com/debian/pve buster pve-enterprise
root@prx:~# apt update
Get:1 http://deb.debian.org/debian buster InRelease [122 kB]
Hit:2 http://security.debian.org buster/updates InRelease
Get:3 http://deb.debian.org/debian buster-updates InRelease [51.9 kB]
Get:4 http://deb.debian.org/debian buster/main amd64 Packages [7,906 kB]
Err:5 https://enterprise.proxmox.com/debian/pve buster InRelease
401 Unauthorized [IP: 212.224.123.70 443]
Get:6 http://deb.debian.org/debian buster/main Translation-en [5,968 kB]
Get:7 http://deb.debian.org/debian buster/contrib amd64 Packages [50.5 kB]
Get:8 http://deb.debian.org/debian buster/contrib Translation-en [44.5 kB]
Get:9 http://deb.debian.org/debian buster-updates/main amd64 Packages [7,868 B]
Get:10 http://deb.debian.org/debian buster-updates/main Translation-en [5,672 B]
Reading package lists... Done
E: Failed to fetch https://enterprise.proxmox.com/debian/pve/dists/buster/InRelease 401 Unauthorized [IP: 212.224.123.70 443]
E: The repository 'https://enterprise.proxmox.com/debian/pve buster InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@prx:~# cat /etc/apt/sources.list.d/pve-enterprise.list
deb https://enterprise.proxmox.com/debian/pve buster pve-enterprise
root@prx:~#
nano /etc/apt/sources.list.d/pve-enterprise.list
# deb https://enterprise.proxmox.com/debian/pve buster pve-enterprise
deb http://download.proxmox.com/debian/pve/ buster pve-no-subscription
wget http://download.proxmox.com/debian/proxmox-ve-release-6.x.gpg -O /etc/apt/trusted.gpg.d/proxmox-ve-release-6.x.gpg
:~# pveversion -v
proxmox-ve: 6.2-1 (running kernel: 5.4.44-2-pve)
pve-manager: 6.2-10 (running version: 6.2-10/a20769ed)
pve-kernel-5.4: 6.2-4
pve-kernel-helper: 6.2-4
pve-kernel-5.4.44-2-pve: 5.4.44-2
pve-kernel-5.4.34-1-pve: 5.4.34-2
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.0.4-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.16-pve1
libproxmox-acme-perl: 1.0.4
libpve-access-control: 6.1-2
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.1-5
libpve-guest-common-perl: 3.1-1
libpve-http-server-perl: 3.0-6
libpve-storage-perl: 6.2-5
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.2-1
lxcfs: 4.0.3-pve3
novnc-pve: 1.1.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.2-9
pve-cluster: 6.1-8
pve-container: 3.1-12
pve-docs: 6.2-5
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-2
pve-firmware: 3.1-1
pve-ha-manager: 3.0-9
pve-i18n: 2.1-3
pve-qemu-kvm: 5.0.0-11
pve-xtermjs: 4.3.0-1
qemu-server: 6.2-11
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-1
zfsutils-linux: 0.8.4-pve1