package org.hibernate.bugreport.jointable.constraintviolation.entity;

import org.hibernate.annotations.GenericGenerator;

import javax.persistence.*;
import java.util.Objects;

@Entity
public class Component {

    @Id
    @GeneratedValue(generator = "UUID")
    @GenericGenerator(
            name = "UUID",
            strategy = "org.hibernate.id.UUIDGenerator"
    )
    private String id;

    private String name;

    @ManyToOne(cascade = CascadeType.ALL)
    @JoinTable(
            name = "laptop_components",
            joinColumns = @JoinColumn(
                    name = "component_id",
                    referencedColumnName = "id"
            ),
            inverseJoinColumns = @JoinColumn(
                    name = "laptop_id",
                    referencedColumnName = "id"
            )
    )
    private Laptop laptop;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Laptop getLaptop() {
        return laptop;
    }

    public void setLaptop(Laptop laptop) {
        this.laptop = laptop;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Component component = (Component) o;
        return Objects.equals(id, component.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }
}

package org.hibernate.bugreport.jointable.constraintviolation.entity;

import org.hibernate.annotations.GenericGenerator;

import javax.persistence.*;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

@Entity
public class Laptop {

    @Id
    @GeneratedValue(generator = "UUID")
    @GenericGenerator(
            name = "UUID",
            strategy = "org.hibernate.id.UUIDGenerator"
    )
    private String id;

    private String brand;

    private String series;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "laptop")
    private Set<Component> components = new HashSet<>();

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brand) {
        this.brand = brand;
    }

    public String getSeries() {
        return series;
    }

    public void setSeries(String series) {
        this.series = series;
    }

    public Set<Component> getComponents() {
        return components;
    }

    public void setComponents(Set<Component> components) {
        this.components = components;
    }

    public void addComponent(Component component) {
        getComponents().add(component);
        component.setLaptop(this);
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Laptop laptop = (Laptop) o;
        return Objects.equals(id, laptop.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }
}

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "laptop")
    @JoinTable(
            name = "laptop_components",
            joinColumns = @JoinColumn(
                    name = "laptop_id",
                    referencedColumnName = "id"
            ),
            inverseJoinColumns = @JoinColumn(
                    name = "component_id",
                    referencedColumnName = "id"
            )
    )
    private Set<Component> components = new HashSet<>();

org.hibernate.AnnotationException: Associations marked as mappedBy must not define database mappings like @JoinTable or @JoinColumn: org.hibernate.bugreport.jointable.constraintviolation.entity.Laptop.components