[JAVA] Snake case field name gets converted to camel case with codegen

Description

Our POJO has some fields which look like this

@Getter 
@Setter
public class Error {
    String errorName;
    String errorCode;
    String error_code;
}

Using mvn plugin we generate the swagger document (say api-service.json) and it creates the fields(errorCode and error_code) as expected like this (Adding just a snippet)

....
          "errorCode" : {
            "type" : "string"
          },
          "errorName" : {
            "type" : "string"
          },
          "error_code" : {
            "type" : "string"
          },
....

Now, when the client uses codegen (command below), the field error_code and its corresponding getters and setters are converted to errorCode and clashes with the already existing field , thus creating compilation error.

Generated Java file

....
  @SerializedName("errorCode")
  private String errorCode = null;

  @SerializedName("error_code")
  private String errorCode = null;
....

Swagger-codegen version

3.0.35

Command line used for generation

swagger-codegen generate \
  -i /Users/sh/api-service.json \
  --api-package com.company.services \
  --model-package com.company.services.dto \
  --invoker-package com.company.services.app \
  --group-id com.company.services \
  --artifact-id service-api \
  --artifact-version 0.0.1-SNAPSHOT \
  -l java \
  -o output-april-2023

How do I retain the original field name of error_code in the generated code after running swagger-codegen ?

Reproduce the issue with the provided swagger-codegen generate command and the sample schema containing both errorCode and error_code. Inspect the generated Java model and the codegen naming behavior; done means the two properties produce distinct valid Java fields, getters, and setters so the generated project compiles.