Unexpected behavior in unidirectional @OneToMany generation (additional FK columns being created)

Below are the two entities with the relationships in a unidirectional way:

CustomerService.java

@Entity
@Table(name = "customer_service")
@Multitenant
@TenantDiscriminatorColumn(name = "tenant_id", discriminatorType = DiscriminatorType.INTEGER, contextProperty = PersistenceUnitProperties.MULTITENANT_PROPERTY_DEFAULT)
public class CustomerService implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id_customer_service")
    private Long id;

    @Column(name = "tenant_id", insertable = false, updatable = false)
    private Long tenantId;

    @Column(name = "date_service")
    @DateTimeFormat(pattern = "dd/MM/yyyy")
    @Temporal(TemporalType.DATE)
    private Date date;

    @Column(name = "average_budget")
    private BigDecimal averageBudget;

    @Column(name = "service_situation")
    private boolean situation;

    @OneToMany
    @JoinColumn(name="fk_customerService")
    private Set<ServiceItem> serviceItem;

    //Getter and Setter...
}

Destination.java

@Entity
@Table(name="destination")
@Multitenant
@TenantDiscriminatorColumn(name="tenant_id", discriminatorType=DiscriminatorType.INTEGER, contextProperty=PersistenceUnitProperties.MULTITENANT_PROPERTY_DEFAULT) 
public class Destination implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id_destination")
    private Long idDestination;

    @Column(name="tenant_id", insertable=false, updatable=false)
    private Long tenantId;

    @OneToMany(cascade={CascadeType.PERSIST, CascadeType.MERGE}, fetch=FetchType.EAGER)
    @JoinColumn(name="fk_destination")
    @Valid
    private Set<Image> images;

    @OneToMany
    @JoinColumn(name="fk_destination")
    private Set<ServiceItem> serviceItem;

    //Geter and Setter...
}

ServiItem.java

@Entity
@Table(name = "service_item")
@Multitenant
@TenantDiscriminatorColumn(name = "tenant_id", discriminatorType = DiscriminatorType.INTEGER, contextProperty = PersistenceUnitProperties.MULTITENANT_PROPERTY_DEFAULT)
@JsonIdentityInfo(generator=ObjectIdGenerators.IntSequenceGenerator.class, property="@id")
public class ServiceItem implements Serializable{

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id_service_item")
    private Long id;


    private Destination destination;


    private CustomerService customerService;

    //Getter and Setter
    }

Well, the generation of the tables in the DB is done by eclipselink, but it is creating (besides the fk_customerService and fk_destination columns), plus two columns like FK! Here is an image to illustrate the problem:

How can I fix this generation?