Why does a new taxonomy term get created when I assign an existing term to a post?

Thanks to @Milo for the solution. I deleted all the defaults to condense the code, and then changed the ‘meta_box_cb’ parameter to ‘post_categories_meta_box’, and it did indeed give me a tag-style metabox.

As an aside, that’s not exactly what I envisioned, so I ended up using CMB2‘s taxonomy_radio field to get what I was after (a drop-down would have worked too):

CMB2 metabox with a taxonomy_radio field

Related Posts:

  1. Possible to register multiple custom taxonomies in one function?
  2. Combine multiple custom user taxonomy in single url
  3. Custom taxonomy forms for user profile
  4. Custom Taxonomy index/archive hierarchy
  5. Proper way to update the slug of a taxonomy using register_taxonomy? [duplicate]
  6. Taxonomize taxonomy terms?
  7. Tracking the name of a custom taxonomy
  8. Custom field with terms from another taxonomy programmatically
  9. Taxonomies and subtaxonomies relations
  10. Custom Taxonomy Not Being Recognized by is_tax()
  11. set_object_terms for custom taxonomy in custom post type – not working
  12. Templates files for custom post type with custom tags
  13. Sort Taxonomy List by Custom Values
  14. Register custom taxonomy from a Advenced custom field option page
  15. Prevent random entries in hierarchical false taxonomies
  16. How to modify a taxonomy that’s already registered
  17. Contact Form 7 – Populate Select List With Taxonomy [closed]
  18. Why is my working Custom Taxonomy not in get_taxonomies array?
  19. Custom taxonomy on permalink
  20. How do I filter posts by taxomony using AJAX
  21. How to return a list of custom taxonomy terms via the Gutenberg getEntityRecords method
  22. Create taxonomy with meta term using the WP Rest Api
  23. Get current term’s ID
  24. Taxonomies not appearing in columns on dashboard
  25. How to modify default taxonomy field to a single text field?
  26. How to set hierarchical terms to a post using wp_set_object_terms
  27. Echo taxonomy term meta on author.php
  28. Hierarchical display of custom taxonomy
  29. How to output the taxonomy term name in a widget
  30. How to link categories to custom taxonomy terms?
  31. List taxonomy / category count showing list published posts only
  32. Save Filter for Taxonomies
  33. Is It Possible To Have Shared WordPress Custom Post Types?
  34. WordPress renames slug of tags used in multiple taxonomies?
  35. Allow only 1 instance of each term in each custom taxonomy
  36. get_terms: determine if taxonomy term has children
  37. Set a taxonomy as private
  38. “show option all” on list categories doesn’t display taxonomy
  39. meta_key & meta_value not working with get_pages and custom taxonomy
  40. wp_insert_post not updating custom taxonomy selected if logged in as a subscriber
  41. Wrapping result of the_terms in a span with a class of the term name
  42. Taxonomy template shows only 10 posts
  43. What is faster: custom taxonomy or serialized post-meta for db retrieval? (over 60,000 posts)
  44. Get taxonomy based on another taxonomy slug
  45. Add Image Uploader In Admin Panel
  46. Tell the difference between a term and page when they have the same ID
  47. taxonomy tax-name archive
  48. Getting associated taxonomies
  49. How to use multiple archive templates for a taxonomy?
  50. Custom Taxonomy Query
  51. Pagination on Custom Tax Pages Removes Spaces from Query Vars
  52. WordPress implode & wp_insert_post question
  53. how can i display taxonomy instead of category on my web page?
  54. Taxonomy Meta Box in User Profile?
  55. Displaying Custom Taxonomy without a hyperlink
  56. Get only immediate children (and not grandchildren) of a hierarchical custom taxonomy term
  57. How to group all terms children’s in custom taxonomy?
  58. My custom taxonomy page is leading in 404 page
  59. Show template part if part of term
  60. How can I change the output display of my pagination?
  61. Non editable custom taxonomy
  62. Corrupted nav-menu?
  63. Remove taxonomy widget from “PAGE” post
  64. Custom taxonomies not showing up in admin menu
  65. List Top 5 taxonomy terms based on number of post
  66. Get list of taxonomies associated with users
  67. Register `product_cat` taxonomy for default post post type
  68. Custom Taxonomy Not Saving in Front End Post
  69. Taxonomy.php how to show post only in current taxonomy with wp_query?
  70. Don’t display taxonomy if empty
  71. Include get_term_link inside search
  72. Set two terms for a post when they differ only by an accent
  73. Custom taxonomies registered via plugin stop existing after function finishes running
  74. Rewrite Search URL Permalink For CPT Custom Taxonomies
  75. display taxonomy terms with link
  76. Listing Cities A custom taxonmy by selection order
  77. Template taxonomy-{taxonomy}.php doesn’t show my posts
  78. Can I get thumbnail of taxonomy?
  79. How can I rewrite a custom taxonomy archive slug
  80. How to truncate the description in the admin panel for a custom taxonomy
  81. What’s the url queryvar for a taxnomy archive?
  82. Get all users attached to a taxonomy
  83. Display taxonomy posts
  84. Add image to taxonomy and output to homepage
  85. Child Pages and Custom Taxonomies
  86. Remove taxonomy menu without removing the metabox?
  87. How to perform a search inside a specific taxonomy category
  88. Sorting Custom Taxonomy in ASC/DESC order?
  89. How can i set post_per_page in my taxonamy?
  90. Exclude 2 in 3 terms of A Taxonomy from all Archives
  91. Select default taxonomy on dropdown
  92. WordPress Taxonomy Menu
  93. Loop custom post type by taxonomy (Category)
  94. get_terms() – unexpected ‘=>’ (T_DOUBLE_ARROW) error
  95. get_term_children specific no id
  96. Custom Search only for my Custom Taxonomy Page – data
  97. Make custom post type display with custom taxonomy in url
  98. How do I create a term for every value of a post meta?
  99. Save selected terms in order of custom taxonomy in post
  100. Taxonomy entries are spawning copies of existing entries with the new title as the existing ID, since upgrade