Hi Alex, thanks for reaching out and for providing those serial numbers. Just to help set expectations for the future, I monitor the forums and community inbox Monday-Friday, 8am-5pm EST, and answer requests in the order they come in. If you need assistance immediately, or outside of those times, you'll want to open a support case on the
Extreme Portal instead.
For these devices, I was able to find the old records that are causing these error messages for you. I've reached out to the original owners to get permission to remove the old records for these devices so you can add them to your own inventory. I'll let you know as soon as I hear back on those requests, please feel free to check in with me here any time for an update.
