diff --git a/homeassistant/components/zwave_js/__init__.py b/homeassistant/components/zwave_js/__init__.py
index b847b76ca17..8c1dd9b2197 100644
--- a/homeassistant/components/zwave_js/__init__.py
+++ b/homeassistant/components/zwave_js/__init__.py
@@ -317,7 +317,9 @@ class ControllerEvents:
         self.discovered_value_ids: dict[str, set[str]] = defaultdict(set)
         self.driver_events = driver_events
         self.dev_reg = driver_events.dev_reg
-        self.registered_unique_ids: dict[str, dict[str, set[str]]] = defaultdict(dict)
+        self.registered_unique_ids: dict[str, dict[str, set[str]]] = defaultdict(
+            lambda: defaultdict(set)
+        )
         self.node_events = NodeEvents(hass, self)
 
     @callback
@@ -488,9 +490,6 @@ class NodeEvents:
         LOGGER.debug("Processing node %s", node)
         # register (or update) node in device registry
         device = self.controller_events.register_node_in_dev_reg(node)
-        # We only want to create the defaultdict once, even on reinterviews
-        if device.id not in self.controller_events.registered_unique_ids:
-            self.controller_events.registered_unique_ids[device.id] = defaultdict(set)
 
         # Remove any old value ids if this is a reinterview.
         self.controller_events.discovered_value_ids.pop(device.id, None)