Comment # 5 on bug 1223109 from Bartosz Kaczyński

I've added Kernel:stable repo and upgraded with --allow-vendor-change flag and
after 

I added the Kernel:stable repository and updated the system (zypper dup
--allow-vendor-change).
After restarting, it booted up correctly.
# uname -r
6.8.8-2.ge7fcfd8-default