Primeiramente, atualizar o sistema atual:

apt update
apt upgrade

Depois:

nano /etc/apt/sources.list

deb http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free
deb http://deb.debian.org/debian/ bookworm-updates main non-free-firmware contrib non-free
deb http://security.debian.org/debian-security/ bookworm-security main contrib non-free-firmware non-free
deb http://deb.debian.org/debian/ bookworm-backports main non-free-firmware contrib non-free

apt update
apt upgrade
apt dist-upgrade

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