I am working on an application in which you can sign up for workshops, among other things. When you do that, you receive an invitation by mail in the form of an ICS file.
I want that when you sign out again or the workshop is canceled, you get another mail, with which you can remove the appointment from the calendar. As I read this here, the appointment must have the same UID for this to work.
The workshops are stored in a database.
My question is whether I should create GUIDs for the workshops, which I would then have to store in the database, or can I use the primary key as the UID?
In the second case I am afraid that other events would be removed from the user if they have the same UID.
