问Hibernate对象映射导致使用Liquibase的SQL错误(errno: 150)

EN

@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class SearchSingle extends OfferSearch implements Comparable<SearchSingle>,   OfferSingle {
    private static final long serialVersionUID = 7618785527154737982L;

@ManyToOne
private Route routeOutbound;

@ManyToOne
private Route routeWayBack;
...
...
}

@JsonAutoDetect
@Entity
public class Route extends PersistentObject {

private static final long serialVersionUID = -4611710805557036851L;
@OneToMany(mappedBy = "routeOutbound")
@Cascade(CascadeType.SAVE_UPDATE)
private List<SearchSingle> searchesOutbound;

@OneToMany(mappedBy = "routeWayBack")
@Cascade(CascadeType.SAVE_UPDATE)
private List<SearchSingle> searchesWayBack;

...
}