Dropping the SIP message with Call-ID

After upgrading our system today, I am getting this message every second in the system. It is it the blocked out IP is the IP of the box…

How can I stop this from coming through.

[2013-11-09 19:46:59] ERROR[2597]: chan_sip.c:28008 handle_incoming: Dropping this SIP message with Call-ID ‘[email protected]:5060’, it’s incomplete.
[2013-11-09 19:47:02] ERROR[2597]: sip/reqresp_parser.c:2294 parse_via: received request without a Via header