principal: Invalid argument while creating "host/192.168.1.6@FOO".

[Jeff Blaine]

I'm stumped:

kadmin:  addprinc -randkey host/192.168.1.6
WARNING: no policy specified for host/192.168.1.6 at FOO; defaulting to no 
policy
add_principal: Invalid argument while creating "host/192.168.1.6 at FOO".
kadmin:

on KDC, kadmin.log says:

Dec 23 13:58:57 noodle kadmind[661](Notice): Request: 
kadm5_create_principal, host/192.168.1.6 at FOO, Invalid argument, 
client=admin/admin at FOO, service=kadmin/admin at FOO, addr=192.168.1.6