Hi,
I am trying to update parent event record after the recurring child event records are created.
So, in trigger i am fetching RecurrenceActivityId and query for the  parent event record using RecurrenceActivityId.
During updating the parent event record i am facing internal server error:
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Below is my trigger code:
trigger DemoEvent on Event (after insert) {
  List<Event> evs = Trigger.new;
  Set<id> ids = new Set<id>();
  System.debug('evs = '+evs);
  for(Event e: evs){
      system.debug('RecurrenceActivityId= '+e.RecurrenceActivityId);
      ids.add(e.RecurrenceActivityId);
  }
 
  System.debug('ids = '+ids);
 
  if(ids.size()>0){
      List<Event> ev = [select id,Description from Event where id in:ids];
      System.debug('Event123 = '+ev);
      for(Event e: ev){
          e.Description='test@test.com';
      }
      
      
      update ev;//Facing internal server error here while updating the parent event record.
  }
}