有没有人知道我怎样才能解决这个问题：'类别'Student'应该有[public，protected]无参数建构函式'？
它在抱怨与SchoolLesson的关系

import javax.persistence.Entity
import javax.persistence.GeneratedValue
import javax.persistence.GenerationType
import javax.persistence.Id
import javax.persistence.JoinColumn
import javax.persistence.ManyToOne

@Entity
data class Student(
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    val id: Long = -1,

    @ManyToOne
    @NotNull
    @JoinColumn(name = "school_lesson_id", referencedColumnName = "id")
    val report: SchoolLesson,

)

EDIT根据请求添加了SchoolLesson

import javax.persistence.*
    import javax.validation.constraints.NotNull

    @Entity
    data class SchoolLesson(
      @Id
      @GeneratedValue(strategy = GenerationType.IDENTITY)
      @Column(nullable = false)
      val id: Long = -1,
    
      @NotNull
      val name: String = "",
    )