When updating PVE on my Debian 10 host, I got the followring error:

root@debianbase:/home/zhi# apt update -y
Hit:1 http://mirrors.aliyun.com/debian buster InRelease
...
The following information may help to resolve the situation:
......
The following packages have unmet dependencies:
pve-firmware : Conflicts: firmware-linux-free but 3.4 is to be installed
E: Broken packages

Solution:

#sudo apt remove linux-image-amd64 && apt upgrade