[Observium] How to completely remove a device

Hey,

I have decomissioned a FreeBSD server and then wanted to remove it from observium. I would assume that clikcing on the "delete device" button would do the trick, but alas I still see the server on my device list.

I have also tried editing the device and deleting it from there to no effect - it says it isn't there any more.

Do I need to remove it and all data concerning it manually from the database and is there an easy way to do that?

-Lasse-