Creating event in google calendar

I managed to create one event using a table I created where I simply record the history of changes made to certain dates.  However, this is not ideal arrangement.  Zapier works off legacy updates and they say that event can change if a new event date is updated. But issue is how do set up my QB table so that it creates a new record but gets updated each time I change the date projects table.  As otherwise I will end up creating several events for the same project.  Is there a setting in webhooks that updates the previously created record?