Why Select query incrementing @Version

Question

The version for the class Application is getting incremented after the execution of the following statement

Queue queue = queueDao.fetchQueueByApplicationId(application.getApplicationId());

It is a simple fetch query only and it should not increment the version of the call any how. But after above line execution the version is getting incremented unexpectedly for Application class

Could someone please help Thanks.

Queue.java

@Entity
@Table(name = "queue")
@NamedQuery(name = "queueByApplicationId", query = "SELECT q from Queue q WHERE q.application.applicationId = ?")
public class Queue implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "queue_id", unique = true, nullable = false)
    private Long queueId;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "created", nullable = false, length = 19)
    private Date created;

    @Column(name = "created_by")
    private Long createdBy;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "updated", length = 19)
    private Date updated;

    @Column(name = "updated_by")
    private Long updatedBy;

    @Version
    @Column(name = "version", nullable = false)
    private Integer version;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "application_id")
    private Application application;

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "queue", cascade = { CascadeType.PERSIST, CascadeType.MERGE })
    private List<QueueAssignedToRole> queueAssignedToRoles;

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "queue", cascade = { CascadeType.PERSIST, CascadeType.MERGE })
    private List<QueueAssignedUser> queueAssignedUsers;

    getter setter ....

}

Application.java

    @Entity
    @Table(name = "application")
    public class Application implements java.io.Serializable {
        private static final long serialVersionUID = 1L;

        private Long applicationId;
        private Integer version;

      @Id
    @GeneratedValue(strategy = IDENTITY)
    @Column(name = "application_id", unique = true, nullable = false)
    public Long getApplicationId() {
        return this.applicationId;
    }

    public void setApplicationId(Long applicationId) {
        this.applicationId = applicationId;
    }

    @Version
    @Column(name = "version", nullable = false)
    public Integer getVersion() {
        return this.version;
    }

    public void setVersion(Integer version) {
        this.version = version;
    }

}

ApplicationQueueDaoImpl.java

@Repository
public class ApplicationQueueDaoImpl extends AbstractDao<Queue> {

    private static final Logger LOGGER = LogManager.getLogger(ApplicationQueueDaoImpl.class);

    @Override
    public Queue fetchQueueByApplicationId(Long applicationId) {
        LOGGER.debug("Fetching Queue information for applicationId {}", applicationId);
        List<Queue> queues = executeNamedQuery("queueByApplicationId", Queue.class, applicationId);
        return CollectionUtils.isEmpty(queues) ? null : queues.get(0);
    }

}

AbstractDao.java

protected <T> List<T> executeNamedQuery(String queryName, Class<T> resultType, Object... positionalParams) {
        TypedQuery<T> query = entityManager.createNamedQuery(queryName, resultType);
        DAOUtils.setPositionalParams(query, positionalParams);

        return query.getResultList();
    }