Education Module: can't create assessment group because of parent assessment group

[Ali_Shaatani]

Read this thread, it may help you

How to downgrade from erpnext 13.x.x-develop to erpnext 12.14.0?

I’d like to add to what our friend @rmeyer already said, for future readers. TLDR: There is no such thing as a downgrade. Before upgrading ERPNext, backup your entire environment. That way you can restore it later, if you change your mind. Details: When you run the command bench switch-branch <new-branch>, this only performs a few git commands. Git checks out different commit hashes for frappe, erpnext, and other Apps. This modifies the files within your ../apps/ subdirectory. Notice I d…