improve error message from #53752

packages/next/src/build/webpack/loaders/next-app-loader.ts

@@ -466,7 +466,7 @@ const nextAppLoader: AppLoader = async function nextAppLoader() {
         // if it's a valid parallel segment, the `children` property will be set appropriately
         if (matched.children && matched.children !== rest[0]) {
           throw new Error(
-            `/You cannot have two parallel pages that resolve to the same path. Please check ${appPath}.`
+            `You cannot have two parallel pages that resolve to the same path. Please check ${`${pathname}/${matched.children}/page`} and ${appPath}. Refer to the route group docs for more information: https://nextjs.org/docs/app/building-your-application/routing/route-groups`
           )
         }