diff --git a/rasa/core/agent.py b/rasa/core/agent.py
index f503c274945a..47e3360f6a5b 100644
--- a/rasa/core/agent.py
+++ b/rasa/core/agent.py
@@ -363,8 +363,6 @@ def load_model(
 
         # update domain on all instances
         self.tracker_store.domain = self.domain
-        if hasattr(self.tracker_store, "_tracker_store"):
-            self.tracker_store._tracker_store.domain = self.domain
         if isinstance(self.nlg, TemplatedNaturalLanguageGenerator):
             self.nlg.responses = self.domain.responses if self.domain else {}