Unable to save section name changes

Hi all,

I'm trying to update the section name of a section in my students notebooks. I have gone through and changed them all manually, however now when I distribute a page the section isn't there as its no in the main database. When I go to change it in the main database so its available to distribute to, i cannot seem to update the names of any of the sections. The save button stays greyed out whether I edit the names or add a new section.

HELP!!