Error Occurred Processing Request

org.hibernate.exception.ConstraintViolationException: could not insert: [com.mandaladesigns.mdx.commerce.CustomerAccount]

org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2186)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2666)
org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)
org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:321)

org.hibernate.exception.ConstraintViolationException: could not insert: [com.mandaladesigns.mdx.commerce.CustomerAccount]