처음에 패키지 생성만 해도 콘솔에 뜨는 오류가 있던데 이게 뭔가요? Extra attributes from the server

app-index.js:35 Warning: Extra attributes from the server: class at html at RedirectErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/redirect-boundary.js:73:9) at RedirectBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/redirect-boundary.js:81:11) at NotFoundErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/not-found-boundary.js:76:9) at NotFoundBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/not-found-boundary.js:84:11) at DevRootNotFoundBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/dev-root-not-found-boundary.js:33:11) at ReactDevOverlay (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/react-dev-overlay/internal/ReactDevOverlay.js:84:9) at HotReload (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/react-dev-overlay/hot-reloader-client.js:307:11) at Router (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/app-router.js:182:11) at ErrorBoundaryHandler (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/error-boundary.js:114:9) at ErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/error-boundary.js:161:11) at AppRouter (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/app-router.js:538:13) at ServerRoot (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/app-index.js:129:11) at RSCComponent at Root (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/app-index.js:145:11)

프레임 1개 더 표시

패키지 생성만 했는데 콘솔에 찍히는 오류가 있던데

그냥 로컬에서 실행해서 뜨는 오류인건가요?