DragonFlyBSD

I got the following panic (sorry it's just a backtrace):

panic: BTYPE MISMATCH L
Trace beginning at frame 0xdf17171c
panic(df171740,cee83300,df1717f4,e3903248,df171764) at panic+0x8c
panic(c06029f3,4c,0,e3903248,cefdf000) at panic+0x8c
hammer_cursor_down(df1717f4) at hammer_cursor_down+0x113
hammer_btree_iterate_reverse(df1717f4,df171a58,0,0,cefdf040) at
hammer_btree_iterate_reverse+0x1c0
hammer_ioc_prune(df171a58,d91c5610,dc874f00,df17195c,1) at
hammer_ioc_prune+0x682
hammer_ioctl(d91c5610,c0fc6801,dc874f00,1,d50b1050) at
hammer_ioctl+0x1c8
hammer_vop_ioctl(df171ac8,df171abc,d8797ab4,d8797ab4,d8cf32f0) at
hammer_vop_ioctl+0x2f
vop_ioctl(d8cead10,c47f3d28,c0fc6801,dc874f00,1) at vop_ioctl+0x58
vn_ioctl(d50f0338,c0fc6801,dc874f00,d50b1050,df171cf0) at
vn_ioctl+0xe0
mapped_ioctl(5,c0fc6801,280f0188,0,df171cf0) at mapped_ioctl+0x3e4
sys_ioctl(df171cf0,6,0,0,d86fa9d0) at sys_ioctl+0x17
syscall2(df171d40) at syscall2+0x20e
Xint0x80_syscall() at Xint0x80_syscall+0x36

I've uploaded the kern.25.gz and vmcore.25.gz to my leaf account.

Thanks,
Joe