First upgrade to bookworm

sudo apt update sudo apt full-upgrade sudo sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list sudo sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list.d/*.list sudo apt update sudo apt full-upgrade sudo reboot

You may get this error

raspi-firmware or sense-hat

Upgrade to trixie

sudo apt update sudo apt full-upgrade sudo sed -i 's/bookworm/trixie/g' /etc/apt/sources.list sudo sed -i 's/bookworm/trixie/g' /etc/apt/sources.list.d/*.list sudo apt update sudo apt full-upgrade sudo reboot

If you get stuck with another error like this

Run the following

sudo dpkg --purge --force-depends lxplug-cpu sudo apt --fix-broken install