When duplicating a previous ILC session, it copies the Zoom link for the ILC. This is a nice feature when creating a lot of ILCs where the same course is held multiple times without having to repeatedly put in the self enrollment rules for each session. (ie. in one week, 3 sessions are offered for a select group employees to sign up for the content) The problem is that if one of them needs to be cancelled (not going to be rescheduled) it makes the meeting ID it copied as the same for all 3, invalid.