diff --git a/homeassistant/components/recorder/core.py b/homeassistant/components/recorder/core.py
index 7cd0ad56f79..a6ec512a9f2 100644
--- a/homeassistant/components/recorder/core.py
+++ b/homeassistant/components/recorder/core.py
@@ -1027,11 +1027,11 @@ class Recorder(threading.Thread):
 
     def _close_event_session(self) -> None:
         """Close the event session."""
-        self._old_states = {}
-        self._state_attributes_ids = {}
-        self._event_data_ids = {}
-        self._pending_state_attributes = {}
-        self._pending_event_data = {}
+        self._old_states.clear()
+        self._state_attributes_ids.clear()
+        self._event_data_ids.clear()
+        self._pending_state_attributes.clear()
+        self._pending_event_data.clear()
 
         if not self.event_session:
             return