When I am trying to insert the data into the table I am getting this below error.

org.springframework.dao.DataIntegrityViolationException: Could not execute JDBC batch update; SQL [insert into messages(createdById, createdDate, lastAccessDate, lastUpdatedById, lastUpdatedDate, version, academicYearId, custId, message, desc , userId, id) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update.

Caused by: java.sql.BatchUpdateException: Duplicate entry '17431' for key 'PRIMARY'


I am using hibernate to save the entity.

The parent table is "Messages" and it has child classes and the mapping is like below.

@OneToMany(fetch=FetchType.EAGER,cascade={CascadeType.ALL})
@JoinColumn(name="messageId")
public Set<MessageDetailsTracking> getMessageDetailsTracking() {
return messageDetailsTracking;


public Object save(Object messages) {
return dao.saveObject(messages);
}
Please help me to solve this issue

Can you add the child entity class and the logic that manages the associations prior to saving the parent.
It might be that the equals/hashCode are not properly implemented and you have a child twice in that Set.