Bad Request에 대한 응답 강의관련 디버깅 질문

선생님, 제공해주신 소스를 참고해서 pom.xml과 application.properties를 비교해봤는데요

모두  동일한 것 같습니다. 아래는 제가 설정한 의존성및 application.properties의 설정입니다.

의존성은 security설정만 주석을 했고 

application.properties는 fail-on-unknown-properties만 true로 설정하고 나머지는 뒷 강의에서 진행될 내용이라 넣지 않았습니다.

[pom.xml]

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>me.whiteship</groupId>
    <artifactId>rest-api-with-spring</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>rest-api-with-spring</name>
    <description>rest-api-with-spring</description>
    <properties>
        <java.version>11</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-hateoas</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.modelmapper/modelmapper -->
        <dependency>
            <groupId>org.modelmapper</groupId>
            <artifactId>modelmapper</artifactId>
            <version>2.3.1</version>
        </dependency>
<!--        <dependency>-->
<!--            <groupId>org.springframework.security.oauth.boot</groupId>-->
<!--            <artifactId>spring-security-oauth2-autoconfigure</artifactId>-->
<!--            <version>2.1.0.RELEASE</version>-->
<!--        </dependency>-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.restdocs</groupId>
            <artifactId>spring-restdocs-mockmvc</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>pl.pragmatists</groupId>
            <artifactId>JUnitParams</artifactId>
            <version>1.1.1</version>
            <scope>test</scope>
        </dependency>
<!--        <dependency>-->
<!--            <groupId>org.springframework.security</groupId>-->
<!--            <artifactId>spring-security-test</artifactId>-->
<!--            <version>${spring-security.version}</version>-->
<!--            <scope>test</scope>-->
<!--        </dependency>-->
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.asciidoctor</groupId>
                <artifactId>asciidoctor-maven-plugin</artifactId>
                <version>1.5.8</version>
                <executions>
                    <execution>
                        <id>generate-docs</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>process-asciidoc</goal>
                        </goals>
                        <configuration>
                            <backend>html</backend>
                            <doctype>book</doctype>
                        </configuration>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework.restdocs</groupId>
                        <artifactId>spring-restdocs-asciidoctor</artifactId>
                        <version>${spring-restdocs.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

[application.properties]

spring.jackson.deserialization.fail-on-unknown-properties=true

위 정보로 어떤 의존성이 누락됐는지 확인하기 어려울 경우 다른 해결방법이 있는지 궁금합니다.

감사합니다.