Can't change menu paths without buckets of errors

Setup

1. Created Panel Page with path in Main Menu.

• Title: Health Insurance
• Path: /health

• Title: What You Need To Know
• Path: /health

(same as Panel Page)

• I then drag it to become a sub-menu item of Heath Insurance, the menu item created by Panels.
• Use case: I do this so that the parent menu item has an active first child item in its sub-menu.

• I edit the Panel Page, and in Settings >> Basic I change the path to reflect /health-insurance

A Quick Note

I've found it to be the case that when I create a menu item in Panel Pages, if even simply reorder the menu item at /admin/structure/menu/manage/main-menu, I am forced to "reset" it if it takes on any future changes from the Panel Pages basic settings page. This is a great annoyance of course, but it hasn't led me to say anything until now because of this finding.

Crash & Burn

As aformentioned, in order to reflect path changes in #3 above, I reset the menu item created by Panels and am warmly greated with the following:

• Notice: Undefined index: health in menu_reset_item() (line 424 of /var/www/[site]/modules/menu/menu.module).
• Notice: Undefined index: title in _menu_link_build() (line 2676 of /var/www/[site]/includes/menu.inc).
• Notice: Undefined index: path in _menu_link_build() (line 2677 of /var/www/[site]/includes/menu.inc).
• PDOException: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'link_path' cannot be null: UPDATE {menu_links} SET menu_name=:db_update_placeholder_0, plid=:db_update_placeholder_1, link_path=:db_update_placeholder_2, router_path=:db_update_placeholder_3, hidden=:db_update_placeholder_4, external=:db_update_placeholder_5, has_children=:db_update_placeholder_6, expanded=:db_update_placeholder_7, weight=:db_update_placeholder_8, depth=:db_update_placeholder_9, p1=:db_update_placeholder_10, p2=:db_update_placeholder_11, p3=:db_update_placeholder_12, p4=:db_update_placeholder_13, p5=:db_update_placeholder_14, p6=:db_update_placeholder_15, p7=:db_update_placeholder_16, p8=:db_update_placeholder_17, p9=:db_update_placeholder_18, module=:db_update_placeholder_19, link_title=:db_update_placeholder_20, options=:db_update_placeholder_21, customized=:db_update_placeholder_22 WHERE (mlid = :db_condition_placeholder_0) ; Array ( [:db_update_placeholder_0] => navigation [:db_update_placeholder_1] => 0 [:db_update_placeholder_2] => [:db_update_placeholder_3] => [:db_update_placeholder_4] => -1 [:db_update_placeholder_5] => 0 [:db_update_placeholder_6] => 1 [:db_update_placeholder_7] => 0 [:db_update_placeholder_8] => 0 [:db_update_placeholder_9] => 1 [:db_update_placeholder_10] => 447 [:db_update_placeholder_11] => 0 [:db_update_placeholder_12] => 0 [:db_update_placeholder_13] => 0 [:db_update_placeholder_14] => 0 [:db_update_placeholder_15] => 0 [:db_update_placeholder_16] => 0 [:db_update_placeholder_17] => 0 [:db_update_placeholder_18] => 0 [:db_update_placeholder_19] => system [:db_update_placeholder_20] => [:db_update_placeholder_21] => a:0:{} [:db_update_placeholder_22] => 0 [:db_condition_placeholder_0] => 447 ) in menu_link_save() (line3053 of /var/www/[site]/includes/menu.inc).

Aftermath

Interestingly, the menu item is reset and reflects the path change in Main Menu. However, exact duplicates of the Health Insurance and What You Need To Know menu items (both with path /health, not /health-insurance) are placed in the Navigation menu. What's more, both paths work along with the newly reset path, /health-insurance.

In addition, without having touched the path in the basic settings of Panel Pages, I am shown a "reset" link in the Main Menu. After clicking this, it appears no changes take place except that the "reset" link is gone.

Testing

Now, let's restore the backup.

• Do #1
• Do #2
• Do #3
• Delete #2
• Reset menu item.
• Same PDOException.

Restore backup.

• Do #1
• Do #2
• Reset menu item. (No change, except "reset" disappears.)
• Do #3
• Duplicate appears - One Health Insurance with path /health and one with /health-insurance. The /health-insurance item is standalone, while /health retains the sub-menu item from #2.

Restore backup.

• Do #1
• Do #2
• Create 2 more panel pages
  • /health/xxx
  • /health/yyy
• Menu Structure that appears at /admin/structure/menu/manage/main-menu
  • /health
    (Health Insurance)
    • /health (What You Need To Know)
    • /health/xxx
    • /health/yyy
• Delete /health/xxx and /health/yyy Panel Pages
  • Menu links are left over in Main Menu
  • Reset them
• Resetting causes two additional "Health Insurance" links to appear (totalling 3), each with paths of /health
  • No "Delete" or "Reset" links are available for either of the two additional links.
• Do #3
• A 4th "Health Insurance" link appears with path /health-insurance

And I'll leave it at that.