인프런 커뮤니티 질문&답변

아래와 같이 오류가 나옵니다. 

 

 

 

2022-06-02 01:56:50.380  WARN 1420 --- [nio-8080-exec-5] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of type 'java.lang.String' to required type 'java.lang.Long'; nested exception is java.lang.NumberFormatException: For input string: "index"]