How to fix failed freebsd 9 -> 10 upgrade, can't load 'kernel'?

Question

FreeBSD

I decided to update the system from 9 to 10.
It seems that the disk space has run out and the necessary files have not been copied.
Now, when loading, it says "can't load 'kernel'", although there is a /boot/kernel/kernel file in the folder I
was too lazy to make a backup))
Can anyone suggest how to fix it?

Answer 1

There was no sadness - they pumped up updates.

Answer 2

but I think to save what I need and put it anew, at the same time clean the system from any old slag

Answer 3

I think with live-sd boot and clean