I am getting 404 error code while performing post request , but the data is successfully getting inserted into the database on spring boot appilcation

When I am performing the post/Delete operation from postman, I am getting 404 error code ,but the data is successfully getting inserted or deleted into my database. I am unable to understand why my code is behaving like this. Sharing screenshot database, api response

Controller class

    @Controller
public class UserController {

    @Autowired
    private UserService userService;

    @PostMapping("/user/add")
 public void addNewUser(@RequestBody User user) throws BLException {
     userService.addNewUser(user);
 }

  @DeleteMapping("/user/delete/{id}")
    public void deleteById(@PathVariable int id){
        userService.deleteById(id);

  }

  @DeleteMapping("/deleteAll")
    public void deleteAll(){
        userService.deleteAll();
  }
}

Service class

@Service
public class UserService {

    @Autowired
   public UserRepository userRepository;

    public void addNewUser(User user) throws BLException {
        try {
            ValidateMobileNumber.validate(user.getPhone());
            userRepository.save(user);


        }
        catch (BLException e){
            System.out.println(e.getMessage());
        }

    }

    public void deleteById(int id){
        userRepository.deleteById(id);
    }
    public void deleteAll(){
        userRepository.deleteAll();
    }
}

build.gradle file

    plugins {
    id 'java'
}

group 'org.example'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.1'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'

    // https://mvnrepository.com/artifact/org.springframework/spring-web
    implementation group: 'org.springframework', name: 'spring-web', version: '5.3.16'
    // https://mvnrepository.com/artifact/io.springfox/springfox-swagger2
    implementation group: 'io.springfox', name: 'springfox-swagger2', version: '2.9.2'



    // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web
    implementation group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '2.6.3'
    // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc

    // https://mvnrepository.com/artifact/org.projectlombok/lombok
    compileOnly group: 'org.projectlombok', name: 'lombok', version: '1.18.22'

    // https://mvnrepository.com/artifact/org.springframework.data/spring-data-commons
    implementation group: 'org.springframework.data', name: 'spring-data-commons', version: '2.6.1'

// https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-devtools
    implementation group: 'org.springframework.boot', name: 'spring-boot-devtools', version: '2.6.3'

// https://mvnrepository.com/artifact/org.aspectj/aspectjweaver
    implementation group: 'org.aspectj', name: 'aspectjweaver', version: '1.9.8'
// https://mvnrepository.com/artifact/org.aspectj/aspectjrt
    implementation group: 'org.aspectj', name: 'aspectjrt', version: '1.9.8'
// https://mvnrepository.com/artifact/aopalliance/aopalliance
    implementation group: 'aopalliance', name: 'aopalliance', version: '1.0'
// https://mvnrepository.com/artifact/cglib/cglib
    implementation group: 'cglib', name: 'cglib', version: '3.3.0'
// https://mvnrepository.com/artifact/org.ow2.asm/asm
    implementation group: 'org.ow2.asm', name: 'asm', version: '9.2'
// https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind
    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.0.1'

    // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa
    implementation group: 'org.springframework.boot', name: 'spring-boot-starter-data-jpa', version: '2.7.2'
    // https://mvnrepository.com/artifact/mysql/mysql-connector-java
    implementation group: 'mysql', name: 'mysql-connector-java', version: '8.0.30'

    // https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc
    implementation group: 'org.springframework.boot', name: 'spring-boot-starter-jdbc', version: '2.7.2'

    implementation group: 'javax.xml.bind', name: 'jaxb-api', version: '2.2.4'


}

test {
    useJUnitPlatform()
}