Cannot exclude particular post from loop of custom post type

Something like this should work from your functions file as long as you use the correct conditional tag for your CPT archive:

function exclude_single_post_cpt($query) {
  if (is_post_type_archive('event') && $query->is_main_query() && !is_admin() ) {
    $query->set('post__not_in', array(1646));
  }
}

add_action('pre_get_posts', 'exclude_single_post_cpt');

Related Posts:

  1. is there a way to retrieve posts that do not have a featured image assigned?
  2. Wp-query causing problems with the_content();
  3. How to create posts (not post template) to be displayed on projects page?
  4. exclude custom post type by meta key in wp_query
  5. Quickest way to get last or oldest post date – WP Query
  6. Exclude the parent custom post-type posts only
  7. How do I create an archive page for standard posts?
  8. Why does using WP_Query inside a shortcode in an elementor page cause the arguments for WP_Query to get malformed?
  9. Loop on front-page.php
  10. WP_Query is printing out only one post when posts_per_page is set to multiple
  11. WordPress Orderby Numeric Value Not Working
  12. How to add post_type=value when editing that post type in the WordPress admin?
  13. Storing posts from query and accessing later via AJAX call
  14. Show custom post type filtered by category
  15. Get latest 3 posts from multiple CPT in one query
  16. Several post types on WP Query by tag and taxonomy
  17. Prioritize posts in query by meta keys?
  18. How to get all tags of a custom post type by id
  19. WP the_posts() on single-cars.php get category link
  20. Different Limit number of post on different archive page
  21. Custom post types and ‘new WP_Query’
  22. Variable not working in WP_Query
  23. WP_Query with custom post type ID
  24. Query within a foreach within a query (queryception)
  25. wordpress lists similar type of posts in a custom post type
  26. display posts of custom post type with custom taxonomy
  27. How to Query in WordPress which shows Alphabetic Posts?
  28. Exclude latest post from WP_Query taxonomy term loop
  29. How to query Posts from a custom post type which contains a custom taxonomy?
  30. Display post from custom post type
  31. list posts of two post types in a single template
  32. How to fetch posts that are stored in the different table than (default) wp_posts?
  33. Exclude a specific post in a Custom Post Type
  34. Display Parent-Child Posts in specific order by comparing IDs in array
  35. how to display posts content on the custom css popup by clicking on each title on the sidebar?
  36. wp_post_delete is deleting all offices
  37. SEARCH QUERIES – REVERSE OUTPUT
  38. How do I insert a custom post type query after a certain number of recent posts and then resume recent posts?
  39. minimize wp_query call to database
  40. subtracting the current post form then whole loop, which is generating all CPT titles
  41. post type => ‘any’ not applied my custom queries
  42. Custom Post By Category
  43. Custom post Query and WordPress Post Query Clash
  44. How to get the posts that my following users are liked?
  45. Get post from Category by Priority
  46. Most efficient way of showing children posts?
  47. Only show current category post
  48. How To Loop Through list with Custom Post Types
  49. Calling specific page with wp query
  50. How to display elements of different post types?
  51. Retrieving IDs of child pages which are in a different post type
  52. Query Posts From Multiple Post Types
  53. Change display wp post type to wp custom post type
  54. Dynamically change post_parent in every page load?
  55. How do I hide single category post on my post page
  56. Wp-theme Development
  57. show the most recent date of all posts to display on front end
  58. Sort ACF by custom taxonomy
  59. Restrict custom post type to only site administrator role
  60. Meta query with boolean true/false value
  61. How to force one column layout on custom post type edit page?
  62. Search multiple custom fields by using meta_query
  63. category__in not working on custom post type
  64. Date query for a custom meta field
  65. Set default option in dropdown of WP_Query?
  66. Display posts in random post types
  67. Custom WP_Query not returning results when querying custom post type
  68. Allow non-logged in users to see a future post after clicking on a list of future posts
  69. Update Post Meta for a logged in user
  70. Problem querying Custom post type by custom fields
  71. Get the category from custom post type
  72. Is it possible to store Custom Post Type data in separate set of tables and still have wp_post class functionality?
  73. can these 3 queries be re-written as 1 query?
  74. cannot override post_types in WP_Query()
  75. Wrapping x posts in html without leaving empty html
  76. Loop increase number
  77. Custom filter for main search: how to exclude specific post_type from search results
  78. Is This Code Efficient – Or is there a better way?
  79. Can’t change posts per page in WordPress Post Type Query
  80. Easy reading or transfer of data from posts?
  81. Creating a Tabbed Widget
  82. Using WP meta query to show custom post types by a start and finish date
  83. Invalid content when I try to import custom post type from the old template wordpress
  84. Display related CPT with custom taxonomy
  85. How to set post date in post_type so that it’s same as latest post in category
  86. build child and anchestor three from post parent
  87. Create a post automatically if search result has zero results
  88. Bulk trashing post ‘fails’
  89. WP_query sort by taxonomy
  90. Linking posts together with Advanced Custom Fields “both ways”
  91. Custom post type not being pulled in widget
  92. Query posts from multiple post types sorted by overarching menu order
  93. Custom Taxonomy Query by Taxonomny not working
  94. Linking custom taxonomies and posts
  95. Query posts by a type and another type only if post is in specific category
  96. Search page for custom post type
  97. how to pass args for archive.php query?
  98. Front end post or photo or both
  99. How to change post cpt with submit button?
  100. Storing every individual update to the posts being updated over time?