Error creating a table with primary key composed of Hibernate

I'm trying to create a table with a composite key in Spring using Hibernate, what happens is that I get the following error:

  

2017-09-14 09: 07: 55.323 ERROR 9108 --- [ost-startStop-1] org.hibernate.tool.hbm2ddl.SchemaUpdate: HHH000388: Unsuccessful: create table faithfuldevents (is_required boolean not null, position integer not null, event_id tinyblob, field_id integer not null, primary key (event_id, field_id))

     

2017-09-14 09: 07: 55.324 ERROR 9108 --- [ost-startStop-1] org.hibernate.tool.hbm2ddl.SchemaUpdate: BLOB / TEXT column 'event_id' used in key specification without a key length

The key of event is a int auto increible but I do not know why you are taking it as a type tinyblob .

The code I am using is the following:

@Entity
@Table(name="Events")
public class Event {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Size(max=200)
    @Column(name="id", length=200)
    private int id;

    private boolean active;

    @Temporal(TemporalType.TIMESTAMP)
    private Date creationDate;

    private Date endingDate;

    @Size(max=2000)
    private String footer;

    @Size(max=2000)
    private String header;

    private String image;

    private String logo;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "event", fetch = FetchType.LAZY)
    private Set<Mail> mails;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "event", fetch = FetchType.LAZY)
    @JsonManagedReference(value="event-Field")
    private Set<FieldEvent> eventfields = new HashSet<>();

    @NotNull
    @Size(max=150)
    private String name;

    private Date startDate;

    public Set<FieldEvent> getEventfields() {
        return eventfields;
    }

    public void setEventfields(Set<FieldEvent> eventfields) {
        this.eventfields = eventfields;
    }

    public int getId() {
        return id;
    }

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

    public boolean isActive() {
        return active;
    }

    public void setActive(boolean active) {
        this.active = active;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Date getEndingDate() {
        return endingDate;
    }

    public void setEndingDate(Date endingDate) {
        this.endingDate = endingDate;
    }

    public String getFooter() {
        return footer;
    }

    public void setFooter(String footer) {
        this.footer = footer;
    }

    public String getHeader() {
        return header;
    }

    public void setHeader(String header) {
        this.header = header;
    }

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }

    public String getLogo() {
        return logo;
    }

    public void setLogo(String logo) {
        this.logo = logo;
    }

    public Set<Mail> getMails() {
        return mails;
    }

    public void setMails(Set<Mail> mails) {
        this.mails = mails;
    }

    public String getName() {
        return name;
    }

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

    public Date getStartDate() {
        return startDate;
    }

    public void setStartDate(Date startDate) {
        this.startDate = startDate;
    }

}


@Entity
@Table(name="Fields")
public class Field {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    private String name;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "field", fetch = FetchType.LAZY)
    @JsonManagedReference(value="field-Event")
    private Set<FieldEvent> fieldEvents;

    public Set<FieldEvent> getFieldEvents() {
        return fieldEvents;
    }

    public void setFieldEvents(Set<FieldEvent> fieldEvents) {
        this.fieldEvents = fieldEvents;
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

}

@Entity
@Table(name="fieldevents")
@IdClass(FieldEventId.class)
public class FieldEvent {

    @Id
    @ManyToOne
    @PrimaryKeyJoinColumn(name="eventId", referencedColumnName="ID")
    @JsonBackReference(value="event-Field")
    private Event event;

    @Id
    @ManyToOne
    @PrimaryKeyJoinColumn(name="fieldId", referencedColumnName="ID")
    @JsonBackReference(value="field-Event")
    private Field field;

    private boolean isRequired;

    private int position;

    public Event getEvent() {
        return event;
    }

    public void setEvent(Event event) {
        this.event = event;
    }

    public Field getField() {
        return field;
    }

    public void setField(Field field) {
        this.field = field;
    }

    public boolean isRequired() {
        return isRequired;
    }

    public void setRequired(boolean isRequired) {
        this.isRequired = isRequired;
    }

    public int getPosition() {
        return position;
    }

    public void setPosition(int position) {
        this.position = position;
    }

}

public class FieldEventId implements Serializable{

    private static final long serialVersionUID = 1L;

    private Event event;

    private Field field;

    public Event getEvent() {
        return event;
    }

    public void setEvent(Event event) {
        this.event = event;
    }

    public Field getField() {
        return field;
    }

    public void setField(Field field) {
        this.field = field;
    }

    @Override
    public int hashCode() {
        // TODO Auto-generated method stub
        return super.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        // TODO Auto-generated method stub
        return super.equals(obj);
    }

    @Override
    public String toString() {
        // TODO Auto-generated method stub
        return super.toString();
    }


}