Gokey vs Lodi

You want an example of chutzpah. Here:

When a dump truck backed into Curtis Gokey's car, he decided to sue the city for damages.

Only thing is, he was the one driving the dump truck.

But that minor detail didn't stop Gokey, a Lodi city employee, from filing a $3,600 claim for the December accident, even after admitting the crash was his fault.

But what's the legal principle invalidating Gokey's claim?