Plan upgrade affecting already scheduled meetings

Hello. I'm a newb, both with the finer points of Zooooooooming, and on this forum. Thanks for your patience!

I have scheduled a meeting under my current "Pro" plan, which does not give access to meeting data reports. I need to create a sign-in, sign-out report. I'll have to upgrade to the Business plan. Fine. Except my atttendees already have the link for the meeting. Will my upgrade affect the current link/participants' ability to sign on?  For so many reasons, re-sending a (new) link is not an option.

TIA.