diff --git a/evennia/typeclasses/attributes.py b/evennia/typeclasses/attributes.py
index 0ed045b41f..a54fb952f9 100644
--- a/evennia/typeclasses/attributes.py
+++ b/evennia/typeclasses/attributes.py
@@ -251,7 +251,7 @@ class AttributeHandler(object):
         if key:
             cachekey = "%s-%s" % (key, category)
             attr = _TYPECLASS_AGGRESSIVE_CACHE and self._cache.get(cachekey, None)
-            if attr:
+            if attr and hasattr(attr, "pk") and attr.pk:
                 return [attr]  # return cached entity
             else:
                 query = {"%s__id" % self._model : self._objid,
diff --git a/evennia/typeclasses/tags.py b/evennia/typeclasses/tags.py
index e6f9b8e5bf..6efdbc9328 100644
--- a/evennia/typeclasses/tags.py
+++ b/evennia/typeclasses/tags.py
@@ -140,7 +140,7 @@ class TagHandler(object):
         if key:
             cachekey = "%s-%s" % (key, category)
             tag = _TYPECLASS_AGGRESSIVE_CACHE and self._cache.get(cachekey, None)
-            if tag:
+            if tag and hasattr(tag, "pk") and tag.pk:
                 return [tag]  # return cached entity
             else:
                 query = {"%s__id" % self._model : self._objid,