Opnsense fails to boot

[endika]

Hi we upgraded our opnsense to 20.7 and it is failing to boot, any sugestion?
this is what I can see in the screen:

panic: general protection fault
cpuid = 3
time = 1
version = FreeBSD 12.1-RELEASE-p7HBSD #0 427d53bc125(stable/20.7)-dirty: Sun Jul 26 05:61:42
root@sensey64:/usr/obj/usr/amd64.amd64/sys/SMP
KBD: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper....
vpanic() at vpanic....
pani() at panic....
trap_fatal()  at trap_fatal....
trap()  at trap....
calltrap() at calltrap....
est_probe() at est_probe....
device_probe_child() at device_probe_child....
device_probe() at device_probe....
bus_generic_attach() at bus_generic_attach....
acpi_cpu_postattach() at acpi_cpu_postattach....
mi_startup() at mi_startup....
btext() at btext....
KBD: enter: panic
[thread pid 0 tid 100000]
Stopped at kdb_enter+0x3b: movq $0,kdb_why
db>

[djowers]

Same issue here but I've done the same upgrade on about 3 other OPNsense boxes