CPT conflicting with Page Slug

I know, they can’t be the same. I’ve changed the CPT name and slug, but the page slug is still adding -2 to the end.

This is my CPT code in the functions.php file:

$labels = array(
    'name' => _x('Portfolio Item', 'post type general name'),
    'singular_name' => _x('Portfolio Item', 'post type singular name'),
    'add_new' => _x('Add New', 'portfolio-item'),
    'add_new_item' => __('Add New Portfolio Item'),
    'edit_item' => __('Edit Portfolio Item'),
    'new_item' => __('New Portfolio Item'),
    'all_items' => __('Portfolio Items'),
    'view_item' => __('View Portfolio Item'),
    'search_items' => __('Search Portfolio Items'),
    'not_found' =>  __('No portfolio items found'),
    'not_found_in_trash' => __('No portfolio items found in Trash'),
    'parent_item_colon' => '',
    'menu_name' => 'Portfolio'
  );

  $args = array(
    'labels' => $labels,
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true,
    'show_in_menu' => true,
    'query_var' => true,
    'rewrite' => array('slug'=>'portfolio-item','with_front'=>false),
    'capability_type' => 'post',
    'has_archive' => true,
    'hierarchical' => false,
    'menu_position' => 5,
    'supports' => array( 'title','editor','thumbnail','excerpt','custom-fields' ),
  ); 

  register_post_type( 'portfolio-item', $args );

The CPT and CPT slug was originally “portfolio” but I change all that. However, when I try to edit the page slug of the Portfolio page it looks like this: /portfolio-2

I do not have any other pages in the trash with the /portfolio slug, all have been permanently deleted. What am I missing that is causing the page slug to not work? It’s driving me crazy, and I can only assume that it’s something simple that I’m overlooking.

Thanks so much for any help 🙂