Trying to add static IP's for a wireless device, why is the save greyed out here?

Having a strange issue, could someone help with why my Save button is greyed out when I want to try and create a static reservation for a wireless device?

Are there any errors anywhere else in the window? Typically if the Save button is greyed out, it means either 1) it is already saved, or 2) there is some error with the configuration.

If you want to invite me to the site, I can also take a look directly.

No error’s directly in the window itself, but perhaps it was already saved? Is there somewhere that I can check where my saved static IP’s are?

I’m not seeing that MAC on the network any more (even saved, which would show up unless it was deleted). Is that expected?

It should be the raspberry pi device that is the MAC I want to use. That pi is set up as a home NVR system, but the Ip has been changing.