I don't understand you, @Igor . I did not change a kernel myself, all I did was apt update. I was asked whether it is debian-based armbian or ubutun-based armbian, right? so I answered I'm pretty sure its debian. Starting with a clean Image again would mean a lot of work.
(Find out how to change serial console to screen output, figure out the correct keyboard layout, learn how to configure wifi again, install software again (not all of it was via apt) ). And all this because I did an apt update?!