问org.hibernate.MappingException:外键XXX必须与引用的主键YYY具有相同的列数

EN

create table users_posts_ratings_map (
  postId integer not null references posts (id),
  userId integer not null references users (id),
  ratingId integer not null references ratings (id),
  primary key (postId, userId)
);

@Embeddable
public class RatingId implements Serializable {
    @ManyToOne
    @JoinColumn(name = "userId")
    private User user;

    @ManyToOne
    @JoinColumn(name = "postId")
    private Post post;

    // getters and setters
}

@Entity(name = "users_posts_ratings_map")
public class UserPostRating {
    @EmbeddedId
    private RatingId userPost;

    @OneToOne
    @JoinColumn(name = "ratingId")
    private Rating rating;

    // getters and setters
}

@Entity(name = "posts")
public class Post {
    @Id
    @Column(nullable = false)
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    // irrelevant fields

    @ManyToMany
    @JoinTable(
            name = "users_posts_ratings_map",
            joinColumns = { @JoinColumn(name = "ratingId") },
            inverseJoinColumns = { @JoinColumn(name = "postId"), @JoinColumn(name = "userId") }
    )
    private Set<UserPostRating> ratings = new HashSet<>();

    // getters and setters
}

org.hibernate.MappingException: Foreign key (FKB278E73083D94769:users_posts_ratings_map [postId,userId])) must have same number of columns as the referenced primary key (users_posts_ratings_map [ratingId,postId,userId])