snmp trap otherEnterprises

I've added some Cisco sg300's to our zenoss server 3.2.1 but I get the following yellow warning

Device: sw03
Component:
Event Class: /Unknown
Status: 0
Start Time: 2014/06/30 09:01:12.000
Stop Time: 2014/06/30 09:08:54.000
Count: 4
Message: snmp trap otherEnterprises.1.101.0.151
Systems:
Groups: | /Network - Office
Location: /Office
Device Class: /Network/Switch
Production State: Production
Device Priority: Normal
Hide details
agent zentrap
clearid
component
count 4
dedupid 192.168.xxx.xxx||||3|snmp trap otherEnterprises.1.101.0.151
device 192.168.xxx.xxx
DeviceClass /Network/Switch
DeviceGroups |/Network - Office
DevicePriority 3
eventClass /Unknown
eventClassKey otherEnterprises.1.101.0.151
eventClassMapping
eventGroup trap
eventKey
eventState 0
evid 18c8f576-b733-4dc4-b23f-41945fb87586
facility unknown
firstTime 2014/06/30 09:01:12.000
ipAddress 192.168.xxx.xxx
lastTime 2014/06/30 09:08:54.000
Location /Office
manager zenoss01
message snmp trap otherEnterprises.1.101.0.151
monitor localhost
ntevid 0
ownerid
priority -1
prodState 1000
severity 3
stateChange 2014/06/30 09:08:55.000
summary snmp trap otherEnterprises.1.101.0.151
suppid
Systems |
Event Details
community mycommunity
oid 1.3.6.1.4.1.9.6.1.101.0.151
otherEnterprises 0
otherEnterprises.1.101.2.3.1.0 %STP-W-PORTSTATUS: gi2: STP status Forwarding
otherEnterprises.1.101.2.3.2.0 1
otherEnterprises.1.101.57.2.8.1.0 50
otherEnterprises.1.101.57.2.8.2.0 0
sysUpTimeInstance 117822156

I've looked at what's plugged into this port an it's just a dell pc.

The switch port Gi02 doesn't have anything set on it.