Laravel 5 Update

I have a model which has lots of columns(about 60) and i want to update it in my application but i need to update 57 columns of it so i tried this one.

public function update($id)
{               
    $vehicle = Vehicle::find($id);

    $input = Request::except('representive','buyer','seller');
    $vehicle->update($input);

    return  redirect('pages/aracislemler/'.$vehicle->id);
}

These 3 columns above are FKs so i try to avoid Integrity constraint violation error but i am still getting this error. How can i solve this problem ?

Any help would be appreciated

via Chebli Mohamed