spring mvc 시작하기 부분에서 오류 질문이요..!

SpringMVC - v1,v2 를 수행할때

코드를 오타없이 정확히 입력했는데도(혹시 몰라서 교재 복붙까지했습니다) 맨 아래 사진과 같은 에러가 뜹니다.

다른 FrontController - v1,v2,v3,v4,v5.... 들은 여전히 잘 작동하구요

제가 어떤걸 잘못했을까요??

코드를 보면 클래스명이 회색으로 뜨긴하는데..... 왜 안되는지 이유를 모르겠습니다ㅠ

+) 이게 정확한 오류 메시지인지는 모르겠으나 혹시 몰라서 이건가 싶어 남깁니다..!

2021-08-19 23:45:36.747 ERROR 14332 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Circular view path [new-form]: would dispatch back to the current handler URL [/springmvc/v2/members/new-form] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)] with root cause

package hello.servlet.web.springmvc.v2;
import hello.servlet.domain.member.Member;
import hello.servlet.domain.member.MemberRepository;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;


@Controller
@RequestMapping("/springmvc/v2/members")

public class SpringMemberControllerV2 {

    private MemberRepository memberRepository = MemberRepository.getInstance();

    @RequestMapping("/new-form")
    public ModelAndView newForm() {
        return new ModelAndView("new-form");
    }

    @RequestMapping("/save")
    public ModelAndView save(HttpServletRequest request, HttpServletResponse
            response) {
        String username = request.getParameter("username");
        int age = Integer.parseInt(request.getParameter("age"));
        Member member = new Member(username, age);
        memberRepository.save(member);
        ModelAndView mav = new ModelAndView("save-result");
        mav.addObject("member", member);
        return mav;
    }

    @RequestMapping //List
    public ModelAndView members() {
        List<Member> members = memberRepository.findAll();
        ModelAndView mav = new ModelAndView("members");
        mav.addObject("members", members);
        return mav;
    }
}