Fix DeactivatedQueryset

project/mixins.py

@@ -10,6 +10,10 @@ class BaseModel(models.Model):
 
 class DeactivatedQueryset(models.Manager):
 
+    def get_queryset(self):
+        queryset = super().get_queryset()
+        return queryset.filter(deactivated_at__isnull=True)
+
     def allow_delete(self):
         super().delete()