Fields required when they shouldn't be.

I have a field that won't let me save any posts if it's empty, it says it's required.

It looks like this:

                    [
                        'name'     => __( 'Title', 'fangoria' ),
                        'id'       => $prefix . 'listicle_title',
                        'type'     => 'text',
		        'required' => false,
                    ],

Where else should I look?