diff --git a/library/calendar_sync.py b/library/calendar_sync.py
index 09850ad..12e003e 100644
--- a/library/calendar_sync.py
+++ b/library/calendar_sync.py
@@ -53,10 +53,12 @@ def sync_ics_to_caldav(module):
 
     existing_events = {}
     for event in target_cal.events():
+        if not event or not event.data:
+            continue
         try:
             for calendar in vobject.readComponents(event.data):
                 for component in calendar.components():
-                    if component.name == 'VEVENT':
+                    if component.name == 'VEVENT' and hasattr(component, "uid"):
                         uid = str(component.uid)
                         existing_events[uid] = event
         except Exception as e:
@@ -110,4 +112,3 @@ def run_module():
 
 if __name__ == '__main__':
     run_module()
-