Sprintboot Error de tiempo de ejecución: No se pudo crear la consulta para el método público abstracto com.example.demo.entity.Department.

Clase Departmentclass:

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Department {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long departmentid;
private String departmentName;
private String departmentAddress;
private String departmentcode;
}

Clase Repository del departamento:

@Repository
public interface DepartmentRepository extends JpaRepository<department, long=””> {

Department findByDepartmentId(long departmentid);
}

Servicio del departamento:

@Service
@Slf4j
public class DepartmentService {

@Autowired
private DepartmentRepository departmentrepository;

public Department saveDepartment(Department department) {

log.info("Dentro del método savedepartment del servicio de departamento");
return departmentrepository.save(department);

}

public Department finddepaartmentbyid(long departmentid) {
log.info(“Dentro del método finddepartmentbyid del servicio del departamento”);
return departmentrepository.findByDepartmentId(departmentid);
}
}

Controlador del departamento:

@RestController
@RequestMapping(“/departments”)
@Slf4j
public class DepartmentController {

@Autowired
private DepartmentService departmentservice;

@PostMapping(“/”)
public Department saveDepartment(@RequestBody Department department)
{
log.info(“Dentro del método savedepatment del controlador del departamento”);
return departmentservice.saveDepartment(department);
}

@GetMapping(“{id}”)
public Department finddepartmentbyid(@PathVariable long departmentid)
{
log.info(“Dentro del método finddepartmentbyid del controlador del departamento”);
return departmentservice.finddepaartmentbyid(departmentid);
}
}

Estoy obteniendo un error de tiempo de ejecución como Error al crear la consulta para el método abstracto público com.example.demo.entity.Department com.example.demo.repository.DepartmentRepository.findByDepartmentId(long)¡No se encontró la propiedad departmentId para el tipo Department! ¿Querías decir ‘departmentid’?</department,>