[BUG] Spring generator alloff creates putItem methods with incorrect arguments

Summary: Openapi-generator-maven-plugin 'alloff' tries to create a putItem method, which I dont need, also it cant create properly, and it fails to compile.

As a part of our javax -> jakarta migration we upgraded to version 6.6.0(it was 5.0. before) I see some of the created java classes (by openapi-generator) has errors, I see methods that should not be there (I compare with old version classes and this 'putTypeItem' doesn't exist in old versions). if they must be there, then they should be created properly.

Note the error in 'typeItem' in method parameters below, there is no type! And this method do not exist in old version. I have compilation errors:

public GetResponse putTypeItem(String key,  **typeItem**) {
  if (this.type == null) {
    this.type = new HashMap<>();
  }
  this.type.put(key, typeItem);
  return this;
}

This is my plugin config:

<plugin>
       <groupId>org.openapitools</groupId>
       <artifactId>openapi-generator-maven-plugin</artifactId>
       <version>6.6.0</version>
       <executions>
         <execution>
           <id>generate</id>
           <goals>
             <goal>generate</goal>
           </goals>
           <configuration>
             <inputSpec>${basedir}/../management-swagger.yaml</inputSpec>
             <generateApis>false</generateApis>
             <generateApiTests>false</generateApiTests>
             <generateApiDocumentation>false</generateApiDocumentation>
             <generateModelDocumentation>false</generateModelDocumentation>
             <generateModelTests>false</generateModelTests>
             <generateSupportingFiles>false</generateSupportingFiles>
             <generatorName>spring</generatorName>
             <configOptions>
               <useJakartaEe>true</useJakartaEe>
               <dateLibrary>java8</dateLibrary>
             </configOptions>
             <modelPackage>com.client.model</modelPackage>
             <typeMappings>
               <typeMapping>Double=java.math.BigDecimal</typeMapping>
             </typeMappings>
           </configuration>
         </execution>
       </executions>
     </plugin>

and this is how my full yaml looks like:

swagger: '2.0'
info:
  title: My title
  termsOfService: ''
  version: 19.0.0
host: myhost.com
schemes:
  - https
consumes:
  - application/json
produces:
  - application/json
paths:
  '/url':
    parameters:
      - type: string
        name: some name
        in: path
        required: true
        description: Some description

definitions:
  MyResponseV2:
    properties:
      type:
        description: Some description
        type: object
        properties:
          code:
            type: string
            description: 'blah'
          description:
            type: string
            description: 'blah'
    allOf:
      - $ref: '#/definitions/PartyType'

  PartyType:
    type: object
    properties:
      code:
        type: string
        description: 'Some description'

EDIT: I get the same error using cli tool as well without any maven plugin:

java -jar openapi-generator-cli-6.6.0.jar generate -g java -i myspec.yaml -o /tmp/java-okhttp/ --openapi-normalizer REFACTOR_ALLOF_WITH_PROPERTIES_ONLY=true

Reproduce the issue with the supplied Swagger definition, Spring generator configuration, and the CLI command using REFACTOR_ALLOF_WITH_PROPERTIES_ONLY=true. Trace Spring model generation for allOf schemas with properties, then verify that the generated Java model compiles and that putTypeItem is either omitted as intended or has a valid parameter type.