[Observium] After server-deletion, I have a dis-associated port shown as down

Hi

I have deleted a server from the device-list, but somehow a single port escaped the deletion, and is now shown as "Port Down" without being attached to any device.

Its called "Vmnic1" and the url to it is " http://observium-ip/device/tab=port/port=352173/"

How can I identify and "clean up" the entry in question?