Installation

sudo apt update
sudo apt upgrade -y
sudo reboot
sudo sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list
sudo apt upgrade --without-new-pkgs
sudo apt full-upgrade

Troubleshooting

Linux kernel build error: return code 11 dkms error

sudo dpkg --purge <*-dkms> && sudo apt -f install
# should find what package is occurring error
# read logs
# my case, /var/libs/dkms/kernel-mft-dkms/4.18.0/build/make.log
# sudo dpkg --purge kernel-mft-dkms && sudo apt -f install resolved the error