Changing URL in Menu Navigation folder to URL of page within

Site URL: https://www.econic.co/

Hi, 

I'm trying to get a menu item to direct to the top-level page within the menu folder. Specifically, the "about" folder navigation link to go to the "about" page. The slug for the About folder in the navigation is /about-2. The first page in the folder is simply /about. When I try to make the URL change in the folder settings, it gives me the notification, "couldn't update collection, validation error on folder update". 

To possibly complicate things, the about-2 page had a 302 redirect on it (the reason I wanted to change it in the first place) going to the /about page. I replaced it with a 301 redirect to /about,  that didn't work, and now the link goes nowhere. I removed the redirect and now the link gets no resolution whatsoever. 

This seems like it would be an easy fix, but I can't figure it out. Help!

Nevermind, I just removed the slug altogether. That worked. Jeez.