From 8-stable to 9.0 RC1 iscsi panic

[Johan Hendriks]

I have a desktop test machine, and i decided to do a upgarde to 9.0RC1.
I dis the buildworld, build kernel, and installkernel step,
Then the reboot to do the installworld step.
But it panics And it stops very early at the boot process.

The console looks like the following (typed by hand)

Copyright (c) 1992-2011 The FreeBSD project.
Copyright (c) 1979 ...................
         The regents of the Uni............
FreeBSD is a regited trade.................
FreeBSD 9.0-RC1 #0: Tue Oct 25 08:58:57 CEST 2011
     root at beasty.testdomain.local:/usr/obj/usr/src/sys/KRNL amd64
can't re-use a leaf (geom_label)!
can't re-use a leaf (iscsi_initiator_max_pdus)!
can't re-use a leaf (iscsi_initiator_max_sessions)!
can't re-use a leaf (iscsi_initiator)!
module_register: module iscsi already excists!
Module iscsi failed to register: 17
module_register: module g_label already excists!
Module g_label failed to register: 17
CPU: intel(R) Core(TM)2 Quad CPU ........................
  origen .......
Features= ...........
Features2= ............
AMD Features=................
AMD Featurres2= ..............
TSC: P-state invariant, performance statistics
real memory = 4294967296 (4096 MB)
avail memory = 3298799616 (3145 MB)
iscsi: version 2.2.4.2
module_register_init: MOD_LOAD (kdbmux, 0xffffffff8058522d, 0) error 6
panic: make_dev_credv: bad si_name (error=17, si_name=iscsi)
cpuid = 0
Uptime: 1s
Automatic reboot in 15 second - press a key on the console to abort

Any idea what i can do?

regards
Johan