[BUG] dart generator creates invalid code

Description

The attached example demonstrates the problem.

It contains two classes (Obj1 and Obj2).
Both have the same mode property.

In the class Obj1 this results in the property

Set<Obj1ModeEnum> mode;

while in the class Obj2 the property looks like this:

Set<ModeEnum> mode;

Here I would expect Set<Obj2ModeEnum> mode;.

In the file obj1.dart the associated type is

class Obj2ModeEnum {
  /// Instantiate a new enum with the provided [value].
  const Obj2ModeEnum._(this.value);
  ...

Here I would expect Obj1ModeEnum.

In the file obj2.dart the corresponding type is correct (but duplicate, since it's in obj1.dart already):

class Obj2ModeEnum {
  /// Instantiate a new enum with the provided [value].
  const Obj2ModeEnum._(this.value);
  ...

openapi-generator version

openapi-generator-cli 7.6.0
  commit : ab7d0cb
  built  : -999999999-01-01T00:00:00+18:00
  source : https://github.com/openapitools/openapi-generator
  docs   : https://openapi-generator.tech/

OpenAPI declaration file content or url

{
  "openapi": "3.0.1",
  "info": {
    "title": "api_test",
    "version": "1.0.0"
  },
  "paths": {},
  "components": {
    "schemas": {
      "Obj1": {
        "type": "object",
        "properties": {
          "mode": {
            "uniqueItems": true,
            "type": "array",
            "items": {
              "type": "string",
              "enum": [
                "mode1",
                "mode2",
                "mode3"
              ]
            }
          }
        }
      },
      "Obj2": {
        "type": "object",
        "properties": {
          "mode": {
            "uniqueItems": true,
            "type": "array",
            "items": {
              "type": "string",
              "enum": [
                "mode1",
                "mode2",
                "mode3"
              ]
            }
          }
        }
      }
    }
  }
}

Generation Details

I'm using the following command:

openapi-generator generate -g dart -i spapi.json -o "$(pwd)/spapi" --additional-properties=pubName=spapi

Steps to reproduce

Use provided sample json and command.

Run the supplied OpenAPI declaration with the documented dart generator command and inspect the generated obj1.dart and obj2.dart files. Trace how the generator names inline enum types for both classes. Done means each class uses its own correctly named enum and the generated Dart code contains no duplicate or invalid references.