Why is a new taxonomy term created when I assign an existing term to a publication?

I have a stumper … I have created a new taxonomy called Article type. I created four values ​​for him, as shown in this metabox:

Metabox article type

When I select the term "Entertainment" and update the publication, something strange happens: the system creates a new term using the term_id of Entertainment in the table wp_terms, see the image below:

New term created behind the scenes.

enter the description of the image here

Clearly, this is not the desired effect, I'm just trying to select "Entertainment."

I have no idea where to start to delve into this … can anyone tell me why this happens?

In case it matters, here is the code used to create the taxonomy:

function hhl_article_type () {
$ labels = array (
& # 39; name & # 39; => _x (& # 39; Types & # 39 ;, & # 39; General name of taxonomy & # 39 ;, & # 39; hhl & # 39;),
& # 39; singular_name & # 39; => _x (& # 39; Type & # 39 ;, & # 39; Taxonomy Singular Name & # 39 ;, & # 39; hhl & # 39;),
& # 39; menu_name & # 39; => __ (& # 39; Article types & # 39 ;, & # 39; hhl & # 39;),
& # 39; all_items & # 39; => __ (& # 39; All items & # 39 ;, & # 39; hhl & # 39;),
& # 39; parent_item & # 39; => __ (& # 39; Main Element & # 39 ;, & # 39; hhl & # 39;),
& # 39; parent_item_colon & # 39; => __ (& # 39; Main element: & # 39 ;, & # 39; hhl & # 39;),
& # 39; new_item_name & # 39; => __ (& # 39; New Item Name & # 39 ;, & # 39; hhl & # 39;),
& # 39; add_new_item & # 39; => __ (& # 39; Add New Item & # 39 ;, & # 39; hhl & # 39;),
& # 39; edit_item & # 39; => __ (& # 39; Edit Item & # 39 ;, & # 39; hhl & # 39;),
& # 39; update_item & # 39; => __ (& # 39; Update item & # 39 ;, & # 39; hhl & # 39;),
& # 39; view_item & # 39; => __ (& # 39; See article & # 39 ;, & # 39; hhl & # 39;),
& # 39; separate_items_with_commas & # 39; => __ (& # 39; Separate elements with commas & # 39 ;, & # 39; hhl & # 39;),
& # 39; add_or_remove_items & # 39; => __ (& # 39; Add or remove items & # 39 ;, & # 39; hhl & # 39;),
& # 39; Choose_from_most_used & # 39; => __ (& # 39; Choose among the most used & # 39 ;, & # 39; hhl & # 39;),
& # 39; popular_items & # 39; => __ (& # 39; Popular items & # 39 ;, & # 39; hhl & # 39;),
& # 39; search_items & # 39; => __ (& # 39; Search Items & # 39 ;, & # 39; hhl & # 39;),
& # 39; not_found & # 39; => __ (& # 39; Not found & # 39 ;, & # 39; hhl & # 39;),
& # 39; no_terms & # 39; => __ (& # 39; No items & # 39 ;, & # 39; hhl & # 39;),
& # 39; items_list & # 39; => __ (& # 39; List of items & # 39 ;, & # 39; hhl & # 39;),
& # 39; items_list_navigation & # 39; => __ (& # 39; Navigation in the list of items & # 39 ;, & # 39; hhl & # 39;),
);
$ rewrite = array (
& # 39; slug & # 39; => & # 39; type & # 39 ;,
& # 39; with_front & # 39; => true,
& # 39; Hierarchical & # 39; => false,
);
$ args = array (
& # 39; labels & # 39; => $ tags,
& # 39; Hierarchical & # 39; => false,
& # 39; public & # 39; => true,
& # 39; show_ui & # 39; => true,
& # 39; show_admin_column & # 39; => true,
& # 39; show_in_nav_menus & # 39; => true,
& # 39; show_tagcloud & # 39; => false,
& # 39; rewrite & # 39; => $ rewrite,
& # 39; show_in_rest & # 39; => false,
& # 39; meta_box_cb & # 39; => & # 39; post_categories_meta_box & # 39 ;,
);
register_taxonomy (& # 39; article_type & # 39 ;, array (& # 39; post & # 39;), $ args);
}
add_action (& # 39; init & # 39 ;, & # 39; hhl_article_type & # 39 ;, 0);