Hi @EllaEpshteyn1,

If you edit their sections, grades and submissions should be fine as those are tied more to the course shell itself than the section.  You *may* lose some analytics info, but it's hard to say for sure what exactly would be impacted.  The biggest thing in my mind is that you mentioned Canvas Catalog.  If enrollment was done through Catalog, and you have certificates set up in Catalog, moving the section in Canvas would probably impact the certificate being given at the end of the course.

-Chris