java: variable employeeService not initialized in the default constructor

I create a new project in java springboot. When I try to run the code it gives the following error.

D:\Project\New folder\demo\src\main\java\com\example\demo\controller\EmployeeController.java:15:35 java: variable employeeService not initialized in the default constructor

My entity class

package com.example.demo.entity;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import lombok.Data;
@Entity
@Data
public class Employee {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long id;

    private String name;
    private String email;
    private String phone;
    private String department;
}

My Repository class like this

package com.example.demo.repository;
import com.example.demo.entity.Employee;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface EmployeeRepository extends JpaRepository<Employee, Long> {
}

My service class

import com.example.demo.entity.Employee;
import com.example.demo.repository.EmployeeRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
@Service
@RequiredArgsConstructor
public class EmployeeService {
    private final EmployeeRepository employeeRepository;

    public Employee postEmployee(Employee employee) {
        return employeeRepository.save(employee);
    }

}

My Controller class

package com.example.demo.controller;
import com.example.demo.service.EmployeeService;
import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.*;
import com.example.demo.entity.Employee;

@RestController
@RequestMapping("/api")
@RequiredArgsConstructor
public class EmployeeController {
    private final EmployeeService employeeService;
    @PostMapping("/employee")
    public Employee postEmployee(@RequestBody Employee employee) {
        System.out.println(employee);
        return employeeService.postEmployee(employee);
    }
}

pom.xml file

<?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>3.4.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>employeeserver</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springserver</name>
    <description>Demo project for Spring Boot</description>
    <url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>
    <properties>
        <java.version>17</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-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.36</version> <!-- You can use the latest stable version -->
            <scope>provided</scope> <!-- This makes Lombok available at compile-time only -->
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </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>

I searched in several AI tools and searched in the Web. I didn't find any solution. AI tools mentions this code is correct. I want a solution for this error.

I tried several methods and finally manually initialized the constructor without using Lombok. It works. Here is the my code

@Service
//@RequiredArgsConstructor
public class EmployeeService {
    private final EmployeeRepository employeeRepository;
    @Autowired
    public EmployeeService(EmployeeRepository employeeRepository) {
        this.employeeRepository = employeeRepository;
    }
    public Employee postEmployee(Employee employee) {
        return employeeRepository.save(employee);
    }
}