Bug#941720: linux-headers-4.19.0-0.bpo.6-amd64 depends on linux-headers-4.19.0-0.bpo.6-common=4.19.67-2+deb10u1~bpo9+1 but only linux-headers-4.19.0-0.bpo.6-amd64=4.19.67-2~bpo9+1 is available

[Andy Gibbs]

I have also observed this, and it is rather critical because I depend heavily 
on VirtualBox which now won't work because it can't build the necessary kernel 
modules ... and try as I might, I cannot get my system to downgrade to the 
previous 4.19.0 kernel.

I have managed to downgrade all the way to the 4.9.189 kernel, but this kernel 
doesn't fully support anbox which the 4.19.0 did...