Cast string id prop to number

packages/concordia-app/src/views/Topic/index.jsx

@@ -12,7 +12,7 @@ const Topic = () => {
         <TopicCreate />
     )
     : (
-        <TopicView topicId={topicId} />
+        <TopicView topicId={parseInt(topicId, 10)} />
     );
 };