API-29: Fixing bug where event latest_start_date would be null for deleted events

src/models/dhbw-rapla-changes/changes/changes.service.ts

@@ -54,8 +54,11 @@ export const getChanges = async (course: string, week: string): Promise<Event[]>
             if (eventsMap.has(row.entry_id)) {
                 let event = eventsMap.get(row.entry_id);
 
+                // Only adjust these fields if the event is not deleted as otherwise they would be null
+                if (!row.isDeleted) {
                     event.latest_event_summary = row.new_summary;
                     event.latest_start_date = row.new_start;
+                }
                 event.changes.push(change);
 
                 eventsMap.set(row.entry_id, event);