$proxy25 error with Spring Service

I have two Service classes which implement the same interface

ServiceClass1

@Service
public class ServiceClass1 implements ItemsService{

@Autowired
Class1DaoImpl class1Dao;

@Transactional
public List<Class1> getAllItems() {
    return class1Dao.getAllItems();

}

ServiceClass2

@Service
public class ServiceClass2 implements ItemsService{

@Autowired
Class2DaoImpl class2Dao;

@Transactional
public List<Class2> getAllItems() {
    return class2Dao.getAllItems();

}

And this is the controller class

     @Controller
     public class IndexController {


    @Autowired
    ServiceClass1 serviceClass1;

    @Autowired
    ServiceClass1 serviceClass2;    

        ............
        .....
}

I got this error when the page was requested

java.lang.IllegalArgumentException: Can not set com.package.ServiceClass1 field com.package.IndexController.serviceClass1 to $Proxy25
sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146)
sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:150)
sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63)
java.lang.reflect.Field.set(Field.java:657)
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:500)
org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutow