#CollectionTable does not connect - spring

Question

i have the two tables
Users Table
create table users (
usernumber int unsigned not null auto_increment primary key,
username varchar(32) not null,
password varchar(72) not null,
displayname varchar(32) not null,
birthday datetime not null,
email varchar(255) not null,
firstname varchar(32) not null,
lastname varchar(32) not null
);
Users Locked Table
create table users_locked (
idx int unsigned not null auto_increment primary key,
usernumber int unsigned not null,
start_date datetime not null,
end_date datetime not null,
memo varchar(32) default '' not null,
foreign key (usernumber) references users(usernumber) on delete cascade
);
and i used #CollectionTable to create the entity associated with the two table
following...
Users.java
#Getter
#Builder
#AllArgsConstructor
#NoArgsConstructor(access = AccessLevel.PROTECTED)
#Entity
#Table(name = "users")
#Access(AccessType.FIELD)
public class Users {
#EmbeddedId
private UsersID usernumber;
#Column(name = "username", unique = true)
private String username;
#Column(name = "password")
private String password;
#Column(name = "displayname")
private String displayname;
#Embedded
private PersonalInformation personal;
#ElementCollection(fetch = FetchType.LAZY)
#CollectionTable(name = "users_locked", joinColumns = #JoinColumn(name = "usernumber"))
private List<LockPeriod> locked;
// ....
}
LockPeriod.java
#Getter
#Builder
#EqualsAndHashCode
#AllArgsConstructor
#NoArgsConstructor(access = AccessLevel.PROTECTED)
#Embeddable
public class LockPeriod {
#Column(name = "start_date")
private Date start;
#Column(name = "end_date")
private Date end;
#Column(name = "memo")
private String memo;
//....
}
but the following error occurs and can not be mapped :
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister
did I do something wrong?
I am sorry for the lack of English.