Not show deactivated live lessons

apps/school/models.py

@@ -62,6 +62,7 @@ class SchoolSchedule(models.Model):
         live_lesson = LiveLesson.objects.filter(
             date__week_day=weekday + 1 if weekday % 7 else 1,
             date__gte=now_time.date(),
+            deactivated_at__isnull=True,
         ).first()
         return live_lesson