Extra guarding required

Author: bouwew

plugwise_usb/nodes/node.py

@@ -511,7 +511,7 @@ async def update_node_details(
                 # Switch reports hardware version of paired Circle (pw_usb_beta #245)
                 if self._node_info.node_type is not None:
                     allowed_models = TYPE_MODEL.get(self._node_info.node_type.value)
-                    if model_info[0] not in allowed_models:
+                    if allowed_models is not None and model_info[0] not in allowed_models:
                         # Replace model_info list
                         model_info = [allowed_models[0]]  # Not Ok for 1 but should not be a problem
                         self._node_info.model = model_info[0]