Rewrite Issue

The custom taxonomy is written in a custom plugin/

//* Add custom taxonomies
//* Define Constants
define( 'PT_WOO', 'product' );
if ( ! function_exists( 'gum_woo_register_tax_product_health_topic' ) ) {

	// Register Custom Custom_Taxonomy
	function gum_woo_register_tax_product_health_topic() {
		$ctax_name = 'Health Topic';
		$ctax_plural = 'Health Topics';
		
		$labels = array(
			'name'                       => _x( $ctax_plural, 'gumtheme' ),
			'singular_name'              => _x( $ctax_name, 'gumtheme' ),
			'menu_name'                  => __( $ctax_plural, 'gumtheme' ),
			'all_items'                  => __( 'All '.$ctax_plural, 'gumtheme' ),
			'parent_item'                => __( 'Parent '.$ctax_name, 'gumtheme' ),
			'parent_item_colon'          => __( 'Parent '.$ctax_name.':', 'gumtheme' ),
			'new_item_name'              => __( 'New '.$ctax_name, 'gumtheme' ),
			'add_new_item'               => __( 'Add New '.$ctax_name, 'gumtheme' ),
			'edit_item'                  => __( 'Edit '.$ctax_name, 'gumtheme' ),
			'update_item'                => __( 'Update '.$ctax_name, 'gumtheme' ),
			'separate_items_with_commas' => __( 'Separate '.$ctax_plural.' with commas', 'gumtheme' ),
			'search_items'               => __( 'Search '.$ctax_plural, 'gumtheme' ),
			'add_or_remove_items'        => __( 'Add or remove '.$ctax_plural, 'gumtheme' ),
			'choose_from_most_used'      => __( 'Choose from the most used '.$ctax_plural, 'gumtheme' ),
			'not_found'                  => __( 'No '.$ctax_name.' Found', 'gumtheme' ),
		);
		
		$args = array(
			'labels'                     => $labels,
			'hierarchical'               => true,
			'public'                     => true,
			'show_ui'                    => true,
			'show_admin_column'          => true,
			'show_in_nav_menus'          => true,
			'show_tagcloud'              => false,
			//'has_archive'         		 => true,
			//'exclude_from_search'		 => false,
			//'publicly_queryable'  		 => true,
			
			'rewrite' => array(
		        'slug' => 'health-topic',
		        'with_front' => false,
		        'hierarchical' => true // to display taxonomy/term
		    ),
		    
		);
		
		register_taxonomy( 'health-topic', PT_WOO, $args );
	
	}
	
	// Hook into the 'init' action
	add_action( 'init', 'gum_woo_register_tax_product_health_topic', 1 );

} //end if