How can we change the Google account that is set as the event owner for all SchoolCal-created events?

Before you change the Google account that is the event owner for SchoolCal-created events, we recommend that you delete all of the previously created SchoolCal events. One easy way to do this is to unselect all school levels on each flow using  SchoolCal filters page: 

Then save and re-sync. This should delete all future SchoolCal-created events so that events are not duplicated once the event owner account is changed. If you would like to delete all events (not just future events), you will need to select the "All Dates (not recommended)" option within the filter tab of each of your active flows.

To change the Google account that is set as the event owner for all SchoolCal-created events, go to the Connections tab of the SchoolCal dashboard, select edit next to the Google connection and re-authenticate via Google and save. Reselect the school levels for which events should be synced on the SchoolCal filters page, save, and re-sync. Feel free to create a ticket with support for a meeting to walk through this process.