Well, this is a long shot, but do you have a Feature Class named FIRE_CurrentYear_py?
Or is that something happening on the AGOL server side?
Just wondering about the _py since a .py file is a python source....
I've also had times where I've had to change Feature names with "_" to "-"
That was usually when I had mixed versions floating around.
Like a 10.1 database that I was touching with ArcMap 10.2.2 or higher...
Time for a help ticket with Esri?