Well, with custom menu’s there can not be any conflicts because, If I’m not mistaking, menu that has a name of a deleted one, will be assigned a new ID and/or a slug so it would be different from the old one. The only thing I can think of is that there is a problem with your server or MySQL which either is very slow or just not working. Also, did you try a different browser? A long shot, but nevertheless worth a try.
Related Posts:
- How can I add a menu item to the admin area?
- Add a Separator to the Admin Menu?
- Placing a Custom Post Type Menu Above the Posts Menu Using menu_position?
- Adding a custom admin page
- How to remove entire admin menu?
- Plugin to remove Admin menu items based on user role?
- Add separator to admin submenu
- Add my own button next to “Screen options” and “Help” in the admin
- How to show custom menu items in the WordPress android app?
- Remove ability to access certain admin menus
- renaming an admin menu item with decimal array index number
- Appearance->Editor not visible
- Custom WP_List_Table displays blank rows
- How do I fix this error: Warning: invalid argument supplied for foreach()?
- How do I set up a webhook?
- Add column to pages table
- Admin pages have no content
- Hide Admin menus per role in WordPress
- WordPress Left Hand Side Admin Menu Always Collapsed
- Reorder plugin items in the admin menu
- Re-ordering Admin Submenu Sections
- Reference external file as a function
- “Automatically add new top-level pages” Default
- How can I get an array/list of all current WordPress Admin Menu items?
- Add number new posts (post_status = pending) to administration menu [duplicate]
- how to only add a top-level admin menu without it creating a sub-level-menu
- add_submenu_page set for multiple roles [duplicate]
- How To Create User Specific Admin User Pages?
- Change the Default Pages Menu View in wp-admin
- How can I remove the “updates” menu in the WordPress Admin panel?
- Remove the whole menu in the admin
- How to change admin menu position of “Media”?
- Change top level menu item to point to custom submenu item
- Hiding Admin Page While Keeping Menu Expanded
- Associating custom submenu item with post type of top level menu item
- Admin doesn’t have sufficient permissions to plugin’s page
- Remove Admin sidebar link
- Single category’s posts list in admin menu
- Add column to pages table
- Dashboard menu missing
- WordPress Remove Submenus
- page not updating with database
- 500 internal server error on wp-admin only
- How can I POST or GET to the same admin page from which I am POST-ing or GET-ing
- Output the admin menu_position for each item
- avoiding the display of certain categories to certain user roles at content entry time
- Admin top level menu, pointing to an external url
- Backend Checkboxes working – but not visual?
- WordPress Admin Menu Order for ‘admin.php’ pages
- Give admin_menu permission to specific users
- Show all admin menus in a table
- Highlight active Admin Menu when added though add_menu_page
- require/include php file in add_menu()
- Create WordPress Menu Item Without Linking to a Custom Page
- wp_is_mobile() inside js
- Simple CSS admin pagination
- Appearance > Menus
- Is It Possible To A Link To The Homepage From The Admin Sidebar?
- How to change the default url for ‘Posts’ link?
- Unsure how to add simple checkboxes that write to a small table to admin
- Add a link to the Admin menu
- Reference external file as a function
- Display admin sidebar into custom post pages if logged
- Modal window from within WordPress admin
- How to save dismissable notice state in WP 4.2?
- Remove admin AND editor from the “change role to” menu in user listing
- Admin account only shows Profile and Dashboard with no activity
- Making Media Library “Alternative Text” Field Required
- How can I place the “Add New Post” contents on a custom page?
- Getting Rid of the WordPress.com Toolbar on Other Sites?
- wp_dropdown_pages() in theme admin page
- How can I load an inline script after the enqueued scripts in admin?
- Limit the menu child levels under “admin > appearance > menus”
- Instructions for a custom post type
- Problems with WP_List_Table and hooks
- Add a page in admin without adding menu item
- WordPress administrator area access disabled temporarily due to widespread brute force attacks
- When submitting the form site.com/blog/wp-admin it goes to site.com/wp-admin
- WordPress admin toolbar not loading styles after migration
- I’m a super admin and I want to give an admin the ability to add new users…?
- Return User Meta text as links to post edit inside the user columns
- Order All Pages table in administration
- Is there a filter to remove or replace the post title’s link in the admin post table view (edit.php)?
- How to pass a specific post id from “all posts” list in Admin panel
- How to change the link of the wordpress logo in the admin bar?
- Admin Menu Hack (Left side in Dashboard)
- Default scripts added to each admin page
- Settings API – Last two tabs not rendered separate
- Admin menu in different languages
- WordPress Admin Panel Left Sidebar No showing on Post create page
- Reset WordPress admin users to limit access
- Is it possible to push admin notices to one specific user instead of all users?
- Blank WordPress admin/dashboard (7 updates pending)
- Custom redirection when managing users in admin
- How to retain HTML5 Attributes on Markup
- Why doesn’t the Media Browser use thumbnail sized images?
- Change Admin URL
- Change the Author name to a custom field?
- Buddypress send admin notification email when new subscriber registers
- Background image in login showing in admin area