EventInfo Unmatched FortiGate 5.0 Data ($Revision: #147 $)

I'm seeing this event every few seconds. I'd like to make it stop.

EventInfo Unmatched FortiGate 5.0 Data ($Revision: #147 $)

ExtraneousInfo 1476468181000 10.0.0.8 date=2016-10-14 time=13:03:01 devname=XXXXX devid=FG100D3xxxxx logid=0000000011 type=traffic subtype=forward level=warning vd=root srcip=10.0.0.7 srcname="XXXXXX" srcport=50991 srcintf="port1" dstip=10.0.1.7 dstport=8002 dstintf="port3" poluuid=0b5cb498-e2eb-51e4-ccc9-960cxxxxxxx sessionid=11100334 action=ip-conn policyid=9 crscore=10 craction=262144 crlevel=medium

Fortigate v5.2.2,build642, recently updated LEM to 6.3.1.  Source IPs are from domain controllers.