How to delete Devices in Netflow Analyzer?

How to delete Devices in Netflow Analyzer?

Hi, I have a Device, with 3 interfaces, that was changed his IP address and now there is displayed the device twice and 6 interfaces. I want to remove one of them. We are using NetFlow plug-in in OPManager v8 and there  is no option to delete. HOw can I "purge" the Device list?

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