[SR-Users] Proxy-Require: privacy error

When a call comes in with a SIP header: "Proxy-Require: privacy" line kamailio throws this error: Aug 21 14:27:57 load1 /usr/sbin/kamailio[29447]: ERROR: <core> [parser/hf.c:224]: dump_hdr_field(): DEBUG: dump_hdr_field: type=18, name=Proxy-Require, body=privacy, parsed=(nil), next=0x7efc42f15150 Aug 21 14:27:57 load1 /usr/sbin/kamailio[29446]: ERROR: <core> [parser/hf.c:224]: dump_hdr_field(): DEBUG: dump_hdr_field: type=18, name=Proxy-Require, body=privacy, parsed=(nil), next=0x7efc42f0a7b0 Aug 21 14:27:58 load1 /usr/sbin/kamailio[29447]: ERROR: <core> [parser/hf.c:224]: dump_hdr_field(): DEBUG: dump_hdr_field: type=18, name=Proxy-Require, body=privacy, parsed=(nil), next=0x7efc42f13180 Aug 21 14:27:58 load1 /usr/sbin/kamailio[29446]: ERROR: <core> [parser/hf.c:224]: dump_hdr_field(): DEBUG: dump_hdr_field: type=18, name=Proxy-Require, body=privacy, parsed=(nil), next=0x7efc42f0dfb8 Anyone know why that happens or how to fix it? -- ^C Chad