diff --git a/src/Commands/GenerateCalendar.php b/src/Commands/GenerateCalendar.php
index 825eb872..ff96d444 100644
--- a/src/Commands/GenerateCalendar.php
+++ b/src/Commands/GenerateCalendar.php
@@ -127,6 +127,9 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             );
 
             $calendarEvent = Event::create()
+                ->uniqueIdentifier(
+                    uid: $event['eventID']
+                )
                 ->name(
                     name: $eventName
                 )