How can I remove "zombie entries" from login items when the controls are dimmed? How can I get rid of zombie entries in Login items?

In this case BambooCore App doesn't respond to the - control even when I select it. Also the hide checkbox is disabled on this item, just like the delete control.
It's far late, but I have discovered today, trying to remove a similar zombie item that you cannot remove items for ALL ITEMS when the padlock icon is closed. Open the padlock for any action that involves other users. That's all.