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Hibernate version: 3.1

Mapping documents:

Code between sessionFactory.openSession() and session.close(): I have not closed the session i have taken since it throws one more exception. I would like to know the cause of ConstraintViolationException.
"Duplicate key or Integrity Constraint " is also generated, is this b'coz multiple threads inserting with different session or some scenario similar to this.

Full stack trace of any exception that occurs:
org.hibernate.exception.ConstraintViolationException: could not insert: [org.kaizen.eagleeye.controller.communication.db.mappingobject.StaticMbeanData]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
ConfigMonitor : localhost
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
ConfigMonitor : kaizen5
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:1986)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2405)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:37)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:269)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:167)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:101)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:530)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:518)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:514)
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)

Name and version of the database you are using: MySQL 5.0

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt: