Unable to update due to unsigned keys

It is possible to upgrade the 202510 image to the current debian 13 release but it’s a lot of work. Start by changing /etc/apt/sources.list to trixie

# deb https://snapshot.debian.org/archive/debian-ports/20230612T050707Z unstable main
deb http://deb.debian.org/debian trixie main contrib non-free non-free-firmware
deb-src http://deb.debian.org/debian trixie main contrib non-free non-free-firmware
deb http://deb.debian.org/debian trixie-backports main contrib non-free non-free-firmware
deb http://deb.debian.org/debian trixie-updates main contrib non-free non-free-firmware
deb http://deb.debian.org/debian-security trixie-security main contrib non-free non-free-firmware

And continue with the painful process of upgrades.

Or just use ilreh’s unofficial image from here Image: Debianrepo-Only latest Trixie with (partial) GPU support - #4 by ilreh

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