Cheatin’ uh? Error after custom post type/ taxonomy

I just enabled and made a custom post type, this is my functions.php

<?php

//
//  Custom Child Theme Functions
//

// I've included a "commented out" sample function below that'll add a home link to your menu
// More ideas can be found on "A Guide To Customizing The Thematic Theme Framework"
// https://themeshaper.com/thematic-for-wordpress/guide-customizing-thematic-theme-framework/

// Adds a home link to your menu
// https://codex.www.ads-software.com/Template_Tags/wp_page_menu
//function childtheme_menu_args($args) {
//    $args = array(
//        'show_home' => 'Home',
//        'sort_column' => 'menu_order',
//        'menu_class' => 'menu',
//        'echo' => true
//    );
//	return $args;
//}
//add_filter('wp_page_menu_args','childtheme_menu_args');

// Unleash the power of Thematic's dynamic classes
//
// define('THEMATIC_COMPATIBLE_BODY_CLASS', true);
// define('THEMATIC_COMPATIBLE_POST_CLASS', true);

// Unleash the power of Thematic's comment form
//
// define('THEMATIC_COMPATIBLE_COMMENT_FORM', true);

// Unleash the power of Thematic's feed link functions
//
// define('THEMATIC_COMPATIBLE_FEEDLINKS', true);

    // custom post types
    function create_post_type() {
    register_post_type(
    'Updates',
    array(
    'labels' => array(
    'name' => __( 'Updates' ),
    'singular_name' => __( 'Update' )
    ),
    'public' => true,
    'menu_position' => 5,
    'rewrite' => array('slug' => 'model'),
    'support' => array('title','author','editor','thumbnail','comments')
    )
    );
    }

    add_action( 'init', 'create_post_type' );

    // taxonomies
    function listing_taxonomy() {
    register_taxonomy(
    'Models',
    'updates',
    array(
    'hierarchical' => true,
    'label' => 'Add Model',
    'query_var' => true,
    'rewrite' => array('slug' => 'Modez')
    )
    );

    }
    //
    add_action( 'init', 'listing_taxonomy' );
?>

and now when i click, Add Model, it get this little message saying
Cheatin’ uh?

I just dont see what i have in the functions to have caused this.