Calendar duplicate every new event that I create

Every time that I create a new event using the calendar, I see the event on the calendar, and after a second I see that somehow the event was duplicated (also in the DB of the events).
I don’t use google calendar or zapier, only the functionality of Glide.

Any idea why Glide would duplicate data?

Did you add an On Submit action to add a row in a form? Forms already create rows, so adding an On Submit action to also add a row is redundant.