iCAL import and deleted events

I am using iCAL import to block dates from a Google Calendar that I update with a custom script. When I add an event in the Google Calendar, a new booking is generated by nobeds as expected. However I noticed that when I delete an event from the Google Calendar, the Nobeds booking is not deleted and the dates remain blocked in the Nobeds calendar even after I sync the iCAL connection. Is there a way for me to automatically free up the dates when I delete events from a synced calendar?