Who has claimed a particular DeviceEUI?

I’m new to Cayenne and I’m trying to add an Adeunis RF Field Tester device. The problem is that I got this device from somebody that got it from somebody else at my company and that person got it from somebody else at my company, etc. Somewhere along the line, this device was added to Cayenne by someone so now I can’t add it to my account (I get the conflict message). I’ve traced back a couple of previous owners and they checked their Cayenne accounts, but didn’t find the device. I’m wondering if someone can help me determine who has claimed this device in Cayenne (I can provide the DevEUI) or even better, if it can be deleted from the database?

PM me your DevEUI