ound this in Where to edit Custom Content fields to optional if there is no plug in?

Maybe you should copy plugin from theme folder to plugin directory and activate it.

EDIT: I’m sorry. I misunderstand you.

I want to have that field optional

It’s needed to change theme php code. The task will be easier if you publish this code.

I guess there is registered save_post hook in the theme code. And this hook checks if image is present. But I can’t give fine answer because I don’t know what is really written in your theme code.

Related Posts:

  1. Run plugins only on certain pages
  2. wordpress content .php file in an iframe’s src in a wordpress post
  3. How to detect WP plugins used on a site
  4. Using WordPress as a CMS: Developer preferences for custom vs existing plugins
  5. Login with OpenID, similar to Stack Exchange sites?
  6. Preserve custom URL parameter on more pages
  7. Why do I get this “plugin does not have a valid header” error?
  8. WordPress Capabilities: edit_user vs edit_users
  9. Passing .pem and .key files in cURL doesn’t work in WordPress
  10. Is there a limit on the size of a WP page?
  11. A Blog’s changelog
  12. Adding a widget programmatically
  13. How to restrict Front-End Editor on a page?
  14. How do I create a custom wordpress slideshow plugin?
  15. Updating a WordPress plugins breaks SVN
  16. Sidebar Generator issue [closed]
  17. Template plugin for blog posts? [closed]
  18. How to load default scripts included with WordPress correctly?
  19. Skip file when plugin updated
  20. Are contributed plugin translations automatically installed in WordPress?
  21. Why would WP-CLI and WP Admin show different list of plugins with updates?
  22. Use WordPress with a custom OAuth2 provider
  23. Translating plugin inside the theme [closed]
  24. Admin Dashboard with Custom Tab for Client
  25. reorder plugin menu position
  26. How can I serve a text file at a custom URL
  27. How to add custom link to menu in wordpress programmatically?
  28. How to send little data between admin pages of my plugin?
  29. How to activate plugins for my WordPress sites from a remote server
  30. Register script in one plugin, and enqueue it in another
  31. how to load the language file in plugin?
  32. Getting a List of Categories for Use in a Plugin?
  33. UnWanted Custom field added in the wp page edit area
  34. WordPress download manager plugin showing attached file is missing/deleted?
  35. How to get all of the activate_plugin action parameters?
  36. Display update notification messages like ‘What’s New’
  37. Gutenberg block can’t save richtext
  38. What can be reason for no plugin-strings available under stable section on translate.wordpress.org?
  39. WP_Terms_List_Table Quick Edit not working
  40. Is there a directory my plugin can write files to that cannot be viewed via the browser/url?
  41. How to exclude certain files from the plugin editor?
  42. file-gallery plugin line 1573 broken in 4.2 upgrade [closed]
  43. How do I use wp_editor() in widget form?
  44. How to create an option page for this simple plugin
  45. Errors when trying to use a plugin to write to the database
  46. _prime_post_caches in wordpress
  47. Can some vulnerabilities in plugins be exploited even when the plugin is inactive?
  48. Plugin settings won’t save changes
  49. how to prevent all css and javascripts files from loading
  50. Best way to count visitors?
  51. WPTouch – how to remove shortcodes or make shortcodes function
  52. Adding class to last list item? Not WP generated
  53. Trying to add a page template for my custom post type from a plugin, but it will not display in the template dropdown unless file is in theme
  54. Custom shortcode for displaying user based on a role parameter
  55. How to execute plugin and theme updates from a web hook / endpoint?
  56. WordPress Plugin Insert Html Code with Shortcode
  57. WordPress gtag.js with User ID tracking
  58. trigger email when post is published by someone a user follows
  59. WP Rest API and json_decode()
  60. Disable submit button order
  61. WP-API Custom Post Type json_no_route
  62. Install old version of plugin from admin panel?
  63. insert an html tag using php plugin
  64. Extend a plugin to include a widget option
  65. Can we give Pending as a Role to wp_insert_user?
  66. Is the Block Bad Queries Plugin Still Relevant?
  67. Rename Smart YouTube’s httpv back to http for all posts
  68. Custom page from wp admin area
  69. Create category for each user
  70. Avada Live is broken on WP
  71. how to display data from user panel using cmb2 metabox?
  72. How page with random php file with query params generated
  73. location lock wordpress website
  74. New Plugin Info request
  75. WooCommerce Product Table – filter query on attributes
  76. Why does plugin_url append absolute file path?
  77. Disable WC Bookings automatic order completion [closed]
  78. PDF Viewer Origin is Different
  79. WordPress Sumo Plugin not showing all images on clicking pinterest icon
  80. Insert Google Maps HTML in WordPress
  81. WP nonce verification
  82. Enable a Coming Soon Page while the rest of the site is accessible
  83. Call to undefined function add_action() in plugin
  84. Created wordpress using quick install on Hostgator but unable to access the URLS
  85. How to Display image from Menu Image in Walker Dropdown Select Menu
  86. How to add separator between default and custom panels in WordPress customizer?
  87. How to replace native comment_count with Comments Evolved aggregate count
  88. Having trouble going from Jfiddle to implementing in WordPress :(
  89. Buddypress Member list not showing admin and mods
  90. Shortcode in a blog post, footer and related products stop working
  91. SVN problem – commit taking forever to fix incomplete prior commit
  92. Editing a built plugin: How to activate it only on a single post page
  93. Holding 2 wp_user in the same action (to update billing_email when user_email is updated)
  94. Strange get_the_* behavior with php 5.4
  95. How to set-up multiple cron task with wp_schedule_event so that they do not overlap?
  96. How to get the real address from a url (permalink)
  97. 404 Page when emptying spam or deleting a plugin
  98. File permissions for wp-minify plugin
  99. How to declare this function correctly?
  100. Plugin version number after code rewrite [closed]