Spring JPA deleteById无法删除实体问题求助

大家好，我最近卡在一个头疼的问题上——尝试用Spring JPA的deleteById方法删除CharacterEntity实体对象，但不管怎么试都没效果，完全删不掉。

下面是相关的实体类代码，麻烦各位帮忙看看哪里可能出问题了：

CharacterEntity 代码 #

@Entity
@Table(name = "CHARACTERS")
class CharacterEntity(
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    val id: Long = 0,
    @ManyToOne
    @JoinColumn(name = "BANK_ID", nullable = false)
    val bank: BankEntity,
    @Column(nullable = true)
    val playerId: Long?,
    @Column(nullable = false)
    val name: String,
    @OneToMany(fetch = EAGER, cascade = [ALL], mappedBy = "character", orphanRemoval = true)
    val accounts: MutableList<AccountEntity> = mutableListOf()
) {
    @OneToOne(fetch = EAGER, cascade = [ALL], mappedBy = "character", orphanRemoval = true)
    val downtimeOverride: DowntimeOverride = DowntimeOverride(0, this)
}

AccountEntity 部分代码 #

@Entity
@Table(name = "ACCOUNTS")
class AccountEntity(
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    val id: Long = 0,
    @ManyToOne
    @JoinColumn(/* 此处代码截断，应为关联CharacterEntity的配置 */)
    // 剩余代码未完整提供
)

我已经在关联关系上配置了cascade = [ALL]和orphanRemoval = true，按道理应该会级联删除关联的子实体，但现在连主实体都删不掉。有没有大佬能指点下可能的原因？比如是不是事务配置的问题，或者关联关系的映射哪里写错了？

备注：内容来源于stack exchange，提问作者The Mather1