I already have the dart 2.2 according to this post https://www.reddit.com/r/FlutterDev/comments/av23cg/google_simultaneously_releases_flutter_sdk_12_and/ehc721z?utm_source=share&utm_medium=web2x
So the plugin look at the line in pubspec.yaml
```
environment:sdk: ">=2.1.0 <3.0.0"
how to resolve :
flutter channel master
flutter upgrade
most problem due to dart鈥榮 version,so you only update dart sdk , by run this cmd
flutter channel master
flutter --version
enter this on your terminal it will fix all the reversion problem that sdk has to meet :
flutter upgrade --force
Most helpful comment
how to resolve :