update statevalues to use undefined

src/Pages/Infrastructure/Details/Hooks/useHardwareMonitorsFetch.jsx

@@ -5,7 +5,7 @@ const useHardwareMonitorsFetch = ({ monitorId, dateRange }) => {
 
 	// Abort early if creating monitor
     if (!monitorId) {
-        return { monitor: null, isLoading: false, networkError: null };
+        return { monitor: undefined, isLoading: false, networkError: undefined };
     }
 	const [isLoading, setIsLoading] = useState(true);
 	const [networkError, setNetworkError] = useState(false);