2-3 진행 중 에러 발생

2-3 강의 중 12분 쯤에 Send를 누르면 200 OK가 떠야한다고 하셨는데 저는 500 에러가 발생합니다!

package com.jyujyu.review.api;

import com.jyujyu.review.service.TestService;
import lombok.AllArgsConstructor;
import lombok.Getter;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@AllArgsConstructor
@RestController
public class TestEntityApi {
    private final TestService testService;

    @PostMapping("/test/entity/create")
    public void createTestEntity(
            @RequestBody CreateTestEntityRequest request
    ) {
        testService.create(request.getName(), request.getAge());
    }

    @AllArgsConstructor
    @Getter
    public static class CreateTestEntityRequest {
        private final String name;
        private final Integer age;
    }
}

package com.jyujyu.review.api;

import com.jyujyu.review.service.TestService;
import lombok.AllArgsConstructor;
import lombok.Getter;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

@AllArgsConstructor
@RestController
public class TestEntityApi {
    private final TestService testService;

    @PostMapping("/test/entity/create")
    public void createTestEntity(
            @RequestBody CreateTestEntityRequest request
    ) {
        testService.create(request.getName(), request.getAge());
    }

    @AllArgsConstructor
    @Getter
    public static class CreateTestEntityRequest {
        private final String name;
        private final Integer age;
    }
}

package com.jyujyu.review.repository;

import com.jyujyu.review.model.TestEntity;
import org.springframework.data.jpa.repository.JpaRepository;

public interface TestRepository extends JpaRepository<TestEntity, Long> {
    // Long -> TestEntity에 @Id가 있는 필드의 자료형을 작성한다.

}

package com.jyujyu.review.model;

import jakarta.persistence.*;
import lombok.Getter;

@Getter
@Table(name = "test")
@Entity
public class TestEntity {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;
    private Integer age;

    public TestEntity(String name, Integer age) {
        this.name = name;
        this.age = age;
    }

    public TestEntity() {
    }

    public void changeNameAndAge(String name, Integer age) {
        this.name = name;
        this.age = age;
    }
}

plugins {
	id 'java'
	id 'org.springframework.boot' version '3.2.2'
	id 'io.spring.dependency-management' version '1.1.4'
}

group = 'com.jyujyu'
version = '0.0.1-SNAPSHOT'

java {
	sourceCompatibility = '17'
}

repositories {
	mavenCentral()
}

configurations {
	compileOnly {
		extendsFrom annotationProcessor
	}
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-web'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
	compileOnly 'org.projectlombok:lombok'
	annotationProcessor 'org.projectlombok:lombok'
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	runtimeOnly 'com.h2database:h2'
}

tasks.named('test') {
	useJUnitPlatform()
}

server.port=8081

spring.h2.console.enabled=true
spring.h2.console.path=/h2-console
spring.h2.console.settings.web-allow-others=true

spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.url=jdbc:h2:mem:rss
spring.datasource.username=sa
spring.jpa.hibernate.ddl-auto=create
spring.jpa.show-sql=true

알려주신대로 코드를 작성하고 포스트맨에서 Send를 눌러도 500 Internal Server:Error 라고 뜨네요 ㅠ 원인을 찾아봐도 안보여서 여쭙습니다..! 참고로 포트는 8081이 맞습니다

혹시 파일 필요하실까봐 링크 첨부했습니다
https://drive.google.com/file/d/1W65YQNY5rOGjWuqr-ntff7_QuTWz4eDw/view?usp=sharing