Exception error in VMware ESXi scan

Exception error in VMware ESXi scan

Hi,
We have multiple VMware ESXi in the data center, All hosts have been scanned, except for one host occurs error during scanning. I check server log and find this log:

Already a row with the same set of primary keys found in this object, this row 
<VMInfo WORKSTATIONID="230" HOSTID="null" VMNAME="vCenter Infrastructure Navigator" VMIPADDRESS="192.168.229.207" GUESTOS="SUSE Linux Enterprise 11 (64-bit)" MEMORYRESERVATION="0" MEMORYLIMIT="-1" MEMORYSHARES="40960" MEMORYSHARESLEVEL="normal" MEMORYCONFIGURED="4096" CPURESERVATION="0" CPULIMIT="-1" CPURESERVATIONINPERCENTAGE="null" CPULIMITINPERCENTAGE="null" CPUSHARES="2000" CPUSHARESLEVEL="normal" CPUCONFIGURED="2" /> already exists in this dataobject <WritableDataObject>..........</WritableDataObject>


        at com.adventnet.persistence.WritableDataObject.addRow(WritableDataObject.java:1169)
at com.adventnet.servicedesk.asset.util.DiscoveryUtil.addVMData(DiscoveryUtil.java:667)
at com.adventnet.servicedesk.asset.util.DiscoveryUtil.constructDataObject(DiscoveryUtil.java:551)

What does it means? What should I do? Who to solve it?

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