panic in sysmon_envsys_unregister

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

I get a panic on shutdown:

netbsd:sysmon_envsys_unregister+0x128:	cmpq	0(%rdx),%r12
sysmon_envsys_unregister
mfii_detach
config_detach
config_detach_all
cpu_reboot
kern_reboot
sys_reboot
syscall
ds	4da0
es	0
fs	1
gs	c632
rdi	ffffffff818f0510	sme_global_mtx
rsi	ffffffff
rbp	ffff9008514e4da0
rbx	ffff90003d04c000
rdx	0
rcx	ffffd9e26f07b700
rax	0
r8	0
r9	0
r10	0
r11	0
r12	ffffd9e26d5b1c40
r13	ffffd9e26d7a5a00
r14	1
r15	ffffffff81802c60	mfii_ca
rip	ffffffff80a8c41e	sysmon_envsys_unregister+0x128
cs	8
rflags	10246
rsp	ffff9008514e4d90
ss	10

This is -current from around yesterday.
I guess the problem is related to
	mfii0: autoconfiguration error: unable to register with sysmon (rv = 86)
	mfii0: autoconfiguration error: unable to create sensors
So probably someone is trying to un-resgister something not registered.