JPQL 查询错误：方法查询验证失败

如何解决JPQL 查询错误：方法查询验证失败

我有实体：

@Entity
public class Battle {

    @SequenceGenerator(name = "battle_sequence",sequenceName = "battle_sequence",allocationSize = 1)
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE,generator = "battle_sequence")
    @Column(name = "id",updatable = false)
    private long id;
    private String title;
    @Enumerated(EnumType.STRING)
    private BattleLevel difficulty;
    @Enumerated(EnumType.STRING)
    private Language language;
    private String prompt;
    @OnetoMany(mappedBy = "battle",cascade=CascadeType.ALL)
    private List<Solution> solutions = new ArrayList<Solution>();
    @ManyToOne
    @JoinColumn(nullable = false,name = "app_user_battle_id")
    private AppUser appUser;

和

@Entity
public class Solution {

    @SequenceGenerator(name = "solution_sequence",sequenceName = "solution_sequence",generator = "solution_sequence")
    @Column(name = "id",updatable = false)
    private long id;
    private String name;
    private String solution;
    @ManyToOne
    @JoinColumn(name = "battle_solution_id")
    private Battle battle;
    @ManyToOne
    @JoinColumn(name = "app_user_solution_id")
    private AppUser appUser;

我使用的是 JpaRepository 接口：

@Repository
    public interface BattleRepository extends JpaRepository<Battle,Long>{

    @Query("select b from Battle b where b.app_user_battle_id = :appUserId")
    List<Battle> findAllByAppUserId(long appUserId);

出于某种原因， findAllByAppUserId 查询引发了验证失败错误。我不确定它到底有什么问题。