[BUG][DART] The language version override has to be the same in the library and its part(s).

Description

I ran into a dart versioning problem. My project has sdk: '>=2.17.0 <3.0.0', and openapi-cli generated API has sdk: '>=2.14.0 <3.0.0'. I can not downgrade my project SDK version, but when I manually change SDK version in "generated_api/pubscpec.yaml", the project builds without errors.
I search possibilities to set up a custom SDK version for openapi-generator-cli before generating API, but found nothing.
Is there any solution for manually or automatically determining the SDK version to avoid such a problem?

openapi-generator version

// https://mvnrepository.com/artifact/org.openapitools/openapi-generator-cli
compileOnly 'org.openapitools:openapi-generator-cli:6.3.0'

OpenAPI declaration file content or url

My declaration JSON file without errors, I can't share it due to my company's policy.

Generation Details

java -jar C:\Users\DEV\Documents\openapi-generator-cli.jar generate -i https://test-example.com/api/v2/api-docs -g dart-dio -o C:\Users\DEV\Documents\Projects\mobile\lib\api -p pubLibrary=mobile.api,pubName=mobile_api,serializationLibrary=json_serializable

Steps to reproduce

Set up in project's pubspec.yaml file SDK version like this:
environment:
sdk: '>=2.17.0 <3.0.0'

Then generate API via openapi-generator-cli.
flutter pub get
flutter pub run build_runner build --delete-conflicting-outputs

Build app, then in the debug logs you will see "The language version override has to be the same in the library and its part(s)." error.

Suggest a fix

Add the ability to manually or automatically determine the SDK version.

Start with the dart-dio generator entry point and the generated pubspec.yaml files, using the reported SDK ranges and generation command to reproduce the language-version mismatch. Done means the generated library and its parts use a manually supplied or automatically determined SDK version consistently, and the documented Flutter build steps complete without the override error.