diff --git a/app/src/main/java/de/sebse/fuplanner/services/kvv/sync/KVVSyncAdapter.java b/app/src/main/java/de/sebse/fuplanner/services/kvv/sync/KVVSyncAdapter.java
index 0a8de20..ab5b9fa 100644
--- a/app/src/main/java/de/sebse/fuplanner/services/kvv/sync/KVVSyncAdapter.java
+++ b/app/src/main/java/de/sebse/fuplanner/services/kvv/sync/KVVSyncAdapter.java
@@ -18,7 +18,6 @@ import de.sebse.fuplanner.services.kvv.KVVListener;
 import de.sebse.fuplanner.services.kvv.types.Announcement;
 import de.sebse.fuplanner.services.kvv.types.Assignment;
 import de.sebse.fuplanner.services.kvv.types.AssignmentList;
-import de.sebse.fuplanner.services.kvv.types.Event;
 import de.sebse.fuplanner.services.kvv.types.EventList;
 import de.sebse.fuplanner.services.kvv.types.Grade;
 import de.sebse.fuplanner.services.kvv.types.Modules;
@@ -100,7 +99,7 @@ public class KVVSyncAdapter extends AbstractThreadedSyncAdapter {
                                     R.string.announcement_updated, R.string.announcement_added, R.string.announcement_removed);
                             sendNotifications(assignments, module.assignments, module.title, Assignment::getTitle, Assignment::getId,
                                     R.string.assignment_updated, R.string.assignment_added, R.string.assignment_removed);
-                            sendNotifications(events, module.events, module.title, evt -> evt.getTitle()+" - "+UtilsDate.getModifiedDate(evt.getStartDate()), Event::getId,
+                            sendNotifications(events, module.events, module.title, evt -> evt.getTitle()+" - "+UtilsDate.getModifiedDate(evt.getStartDate()), event -> String.valueOf(event.getStartDate()),
                                     R.string.event_updated, R.string.event_added, R.string.event_removed);
                             sendNotifications(gradebook, module.gradebook, module.title, Grade::getItemName, Grade::getItemName,
                                     R.string.gradebook_updated, R.string.gradebook_added, R.string.gradebook_removed);
@@ -124,7 +123,7 @@ public class KVVSyncAdapter extends AbstractThreadedSyncAdapter {
         if (oldList == null || newList == null) {
             return;
         }
-        ArrayList<T> obsoletes = new ArrayList<T>();
+        ArrayList<T> obsoletes = new ArrayList<>();
         for (T old: oldList) {
             obsoletes.add(old);
         }
diff --git a/app/src/main/java/de/sebse/fuplanner/services/kvv/types/Event.java b/app/src/main/java/de/sebse/fuplanner/services/kvv/types/Event.java
index 8a6005c..c94c975 100644
--- a/app/src/main/java/de/sebse/fuplanner/services/kvv/types/Event.java
+++ b/app/src/main/java/de/sebse/fuplanner/services/kvv/types/Event.java
@@ -118,6 +118,6 @@ public class Event implements Serializable {
 
     @Override
     public int hashCode() {
-        return Objects.hashCode(getId(), getType(), getStartDate(), getEndDate(), getTitle(), getLocation());
+        return Objects.hashCode(getType(), getStartDate(), getEndDate(), getTitle(), getLocation());
     }
 }