Amplifyでビルドあとのデプロイでエラーが出る

2023/11/15 8:54:00

2023-11-14T23:35:19 [INFO]: Beginning deployment for application XXXXXXX, branch:main, buildId 0000000082
2023-11-14T23:35:20 [INFO]: Got archive: 672783 bytes
2023-11-14T23:35:20 [ERROR]: {"message":"Unsupported Node.js version: v20.9.0. Try re-building the App with a supported Node.js version.","code":"UnsupportedRuntime"}

AmplifyでNode.js 20を使う方法で20に設定していたのを18にしたらなんか動いた。