What does the following message mean?

[1mode = 0100644, inum = 107010, fs = /var]
panic: ffs_valloc: dup alloc

Stopped at    _Debugger+0x6:  unlk   a6
db>

And could it have something to do with the coredump/crash problems?
System just crashed with this message -- luckily, no files seem to have
been hurt.

--Brett