Missing attribute: serial

Hey All!

When trying to update/create a host on 1.9…i'm getting the following

Warning!missing attribute: serial

I have attached here a full trace as per the website / output. Any
thoughts? This wasn't happening on 1.8.3

PS - it doesn't matter if it's a new, old host, different host group, etc.

foreman-serial-error.txt (16.1 KB)