Undo on start (to reactivate)

src/main/java/de/ph87/kleinanzeigen/telegram/TelegramAdapter.java

@@ -92,6 +92,7 @@ public class TelegramAdapter {
   @EventListener(ChatRequestEnable.class)
   public void onChatEnable(@NonNull final ChatRequestEnable request) {
     chatService.setEnabled(request, request.isEnable(), request.getUsername());
+    messageService.undo(request);
   }
 
   @Async