Warrior keybinds - "cancel hip fire"

Playing on PC.

I'm trying to change keybinds so that space bar is jump, F is sprint, and shift is dodge. Every time I try to save my keybinds, I get a warning that "one or more Essential Actions do not have an input". 

As far as I can tell, this is because I have unbound "cancel hip fire", but that isn't a command I can remap in this interface. 

I can sort of get around it by using the keybinds I used for my mage -- apparently canceling hip fire isn't a concern for mages.