Error when trying to set a DHCP static map in 2.4.4

[dspearing]

So, this actually happened in the release prior to 2.4.4 as well but I tried upgrading hoping it would fix the issue, spoiler alert... it didn't. The problem I'm having is that I created a static mapping in DHCP for a MAC address on my network then deleted it because I wanted to change the IP address as I had fat fingered it. Now when I try to create a new static mapping for that MAC address it tells me "this MAC address or client identifier already exists". I've tried rebooting, deleting the temporary IP assignment it got out of the default pool, deleting the /tmp/config.cache, and verifying that it is not configured in the config.xml anywhere. I'm kinda at a loss, anyone know how I can purge this and enter a new static entry?