Hi
I'm working on MySQL,Seam 2.1 with 2 entities course and branch.. (course and branch tables got Auto incremental ids)

Im using JPA,Hibernate with seam.
I have a form where i can submit details of a course and multiple branches.

` entityManager.persist(course);
  for (Branch branch : branchs) {
         if(branch.getTitle()!=null&&!"".equals(branch.getTitle()))
                {
                                branch.setCourse(course);
                                entityManager.persist(branch);
                }
                                 }


But here i'm getting sql error



3:30:54,812 INFO =RegCourse= RegCourse.regCourse() action called with:
13:30:54,812 INFO [STDOUT] Hibernate:
    insert
    into
        engweb1.course
        (duration, title, id)
    values
        (?, ?, ?)
13:30:54,828 INFO [STDOUT] Hibernate:
    insert
    into
        engweb1.branch
        (title, Course_id, acro, id)
    values
        (?, ?, ?, ?)
13:30:54,828 WARN =JDBCExceptionReporter= SQL Error: 1452, SQLState: 23000
13:30:54,828 ERROR =JDBCExceptionReporter= Duplicate key or integrity constraint violation message from server: "Cannot add or update a child row: a foreign key constraint fails (`engweb1/branch`, CONSTRAINT `fk_Branch_Course` FOREIGN KEY (`Course_id`) REFERENCES `course` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION)"
13:30:54,828 ERROR [AbstractFlushingEventListener] Could not synchronize database state with session
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
        at org.hibernate.jdbc