Meeting Agenda Settings - Unrequested Meeting Description Changes

May need guidance on revising an existing agenda template. I recently added a "boilerplate" to my regular meeting agenda.  When I did this, I thought I saved as a new template; I did rename the template. Anyway, for many, many previous meetings going back like 4 years, if the "Meeting Description" field was empty, my boilerplate populated those meetings. I'm looking for the easiest way to correct.

1) Is there a way to wipe out the meeting descriptions in 1 step without losing meeting agenda items already populated in past and future meetings? Is there an underlying way to correct the template that those meetings were created from?  Risks of losing meeting details?
2) How do I ensure the latest version of my template is used going forward only?

You haven't provided your club number - so we can't investigate.
a changed meeting description template only shows on dated agendas created after the change.  That said I've never seen empty descriptions.  I'm assuming that is the reason they have been filled.  If so, I doubt it can be undone unless manually, as the dated agendas now have descriptions  
 

Sorry assumed my credentials were in my profile. Club is 1739738 Copeland Sidney (OH) Toastmasters.  I'm VPE. I removed the meeting descriptions going backwards in time until sometime in 2021.

Yes, the dates in question never had the Meeting Description field populated. Usually only special announcements were entered.