diff --git a/src/Bundle/ChillCalendarBundle/RemoteCalendar/Connector/MSGraphRemoteCalendarConnector.php b/src/Bundle/ChillCalendarBundle/RemoteCalendar/Connector/MSGraphRemoteCalendarConnector.php
index 7f85273c8..09bf4b129 100644
--- a/src/Bundle/ChillCalendarBundle/RemoteCalendar/Connector/MSGraphRemoteCalendarConnector.php
+++ b/src/Bundle/ChillCalendarBundle/RemoteCalendar/Connector/MSGraphRemoteCalendarConnector.php
@@ -20,6 +20,7 @@ use Chill\CalendarBundle\RemoteCalendar\Connector\MSGraph\OnBehalfOfUserHttpClie
 use Chill\CalendarBundle\RemoteCalendar\Connector\MSGraph\OnBehalfOfUserTokenStorage;
 use Chill\CalendarBundle\RemoteCalendar\Connector\MSGraph\RemoteEventConverter;
 use Chill\CalendarBundle\Repository\CalendarRangeRepository;
+use Chill\CalendarBundle\Repository\CalendarRepository;
 use Chill\MainBundle\Entity\User;
 use DateTimeImmutable;
 use Exception;
@@ -38,6 +39,8 @@ class MSGraphRemoteCalendarConnector implements RemoteCalendarConnectorInterface
 
     private CalendarRangeRepository $calendarRangeRepository;
 
+    private CalendarRepository $calendarRepository;
+
     private LoggerInterface $logger;
 
     private MachineHttpClient $machineHttpClient;
@@ -55,6 +58,7 @@ class MSGraphRemoteCalendarConnector implements RemoteCalendarConnectorInterface
     private OnBehalfOfUserHttpClient $userHttpClient;
 
     public function __construct(
+        CalendarRepository $calendarRepository,
         CalendarRangeRepository $calendarRangeRepository,
         MachineHttpClient $machineHttpClient,
         MapCalendarToUser $mapCalendarToUser,
@@ -65,6 +69,7 @@ class MSGraphRemoteCalendarConnector implements RemoteCalendarConnectorInterface
         TranslatorInterface $translator,
         UrlGeneratorInterface $urlGenerator
     ) {
+        $this->calendarRepository = $calendarRepository;
         $this->calendarRangeRepository = $calendarRangeRepository;
         $this->machineHttpClient = $machineHttpClient;
         $this->mapCalendarToUser = $mapCalendarToUser;
@@ -157,6 +162,7 @@ class MSGraphRemoteCalendarConnector implements RemoteCalendarConnectorInterface
 
             $ids = array_map(static function ($item) { return $item['id']; }, $bareEvents['value']);
             $existingIdsInRange = $this->calendarRangeRepository->findRemoteIdsPresent($ids);
+            $existingIdsInCalendar = $this->calendarRepository->findRemoteIdsPresent($ids);
 
             return array_values(
                 array_map(
@@ -166,8 +172,8 @@ class MSGraphRemoteCalendarConnector implements RemoteCalendarConnectorInterface
                     // filter all event to keep only the one not in range
                     array_filter(
                         $bareEvents['value'],
-                        static function ($item) use ($existingIdsInRange) {
-                            return (!$existingIdsInRange[$item['id']]) ?? true;
+                        static function ($item) use ($existingIdsInRange, $existingIdsInCalendar) {
+                            return ((!$existingIdsInRange[$item['id']]) ?? true) && ((!$existingIdsInCalendar[$item['id']]) ?? true);
                         }
                     )
                 )
diff --git a/src/Bundle/ChillCalendarBundle/Repository/CalendarRepository.php b/src/Bundle/ChillCalendarBundle/Repository/CalendarRepository.php
index 8af66cc34..ed4b7b22d 100644
--- a/src/Bundle/ChillCalendarBundle/Repository/CalendarRepository.php
+++ b/src/Bundle/ChillCalendarBundle/Repository/CalendarRepository.php
@@ -25,11 +25,14 @@ use function count;
 
 class CalendarRepository implements ObjectRepository
 {
+    private EntityManagerInterface $em;
+
     private EntityRepository $repository;
 
     public function __construct(EntityManagerInterface $entityManager)
     {
         $this->repository = $entityManager->getRepository(Calendar::class);
+        $this->em = $entityManager;
     }
 
     public function countByAccompanyingPeriod(AccompanyingPeriod $period): int