1. move the event to a tile you cant get to on the map
2. use the remove event action for a temporary removal (until you reopen game it wont be there)
3. use a variable (set it to a different number) so the event wont be active anymore. and like have it so variable must be like 0 to be able to execute event, if its 1 it wont do anything??
i dunno how else :D