How to resolve error when using google_mobile_ads in flutter?

Question

Dart

Hi all!
I made an application, I decided to add advertising from Google.
I copied all the code from the documentation, installed the library.
And then the following error pops up:
This app is using a deprecated version of the Android embedding.
To avoid unexpected runtime failures, or future build failures, try to migrate this app to the V2 embedding.
Take a look at the docs for migrating an app: https://github.com/flutter/flutter/wiki/Upgrading-...
The plugin `google_mobile_ads` requires your app to be migrated to the Android embedding v2.

I tried to change the version of android, it did not help.