openapi-generator 6.2.1 generates "import java.util.String" when specifying operation parameters

[m0wlheld]

Running Maven Plugin scs-multiapi:6.2.1:openapi-generation with Java 17 and the OpenAPI document below, the generated Java code imports "java.util.String" and does therefore not compile.

package com.example.api;

import java.util.String;
import java.util.Optional;

openapi.yml:

info:
  description: Description
  title: Title
  version: 1.0.0
openapi: 3.0.3
paths:
  '/path':
    get:
      description: >-
        Path Description
      operationId: doGetPath
      parameters:
        - in: query
          name: queryParam
          schema:
            type: string
      responses:
        "200":
          content:
            text/plain:
              schema:
                type: string
          description: Response Description
      summary: Path Summary
      tags: []


servers:
  - url: http://localhost:8080

pom.xml:

        <plugin>
          <groupId>com.sngular</groupId>
          <artifactId>scs-multiapi-maven-plugin</artifactId>
          <version>6.2.1</version>
          <executions>
            <execution>
              <id>openapi</id>
              <phase>generate-sources</phase>
              <goals>
                <goal>openapi-generation</goal>
              </goals>
              <configuration>
                <specFiles>
                  <specFile>
                    <filePath>${project.basedir}/openapi.yml</filePath>
                    <apiPackage>com.example.api</apiPackage>
                    <modelPackage>com.example.api.model</modelPackage>
                  </specFile>
                </specFiles>
                <springBootVersion>3</springBootVersion>
              </configuration>
            </execution>
          </executions>
        </plugin>

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[m0wlheld]

The issue was introduced by Maven Plugin version 6.2.0, 6.1.0 is not affected. The fix is present in version 6.3.1, but that requires Java 21.

Since I am still using Java 17, I cannot go further than 6.1.0 for now. Any chance to backport the fix into a 6.2.1?