Change slug from 'game-review' to 'review'

Basically what I’m trying to do is change any reference to ‘game-review’ to simply ‘review’ specifically, in the site URL. In functions.php I’ve made some edits in the “Create custom post types” section as follows:

function gamepress_register_reviews_post_type() {
	// Game reviews
    register_post_type( 'gamepress_reviews',
        array(
            'labels' => array(
                'name' => __( 'Reviews', 'gamepress' ),
                'singular_name' => __( 'Review', 'gamepress' ),
                'add_new' => __('Add new review', 'gamepress'),
                'edit_item' => __('Edit review', 'gamepress'),
                'new_item' => __('New review', 'gamepress'),
                'view_item' => __('View review', 'gamepress'),
                'search_items' => __('Search reviews', 'gamepress'),
                'not_found' => __('No reviews found', 'gamepress'),
                'not_found_in_trash' => __('No reviews found in Trash', 'gamepress'),
            ),
            'public' => true,
			'publicly_queryable' => true,
			'show_ui' => true,
			'show_in_nav_menus' => true,
			'exclude_from_search' => false,
			'hierarchical' => false,
            'menu_position' => 20,
			'has_archive' => true,
            'rewrite' => array('slug' => 'review'),
            'supports' => array('title','editor','author','thumbnail','excerpt','trackbacks','comments','revisions'),
            'taxonomies' => array('post_tag'),
            'yarpp_support' => true
        )
    );

This changed the text in the admin panel, and when making a review, WP points to /review/title instead of /game-review/title but it’s just taking me to a 404 page now. Everything is apparently still being posted in /game-review but I can’t find any other reference to it in functions.php

Any help with this is very much appreciated .