The thread is rather old but I have the same problem with hibernate 3.6.4.
I could solve this by adding the attribute allocationSize=1 to the annotation
In your case:
@Id(generate = GeneratorType.SEQUENCE, generator = "mysequence")
@SequenceGenerator(name = "mysequence", sequenceName = "MY_SEQ",allocationSize=1)
//@SequenceGenerator(name = "mysequence", sequenceName = "hibernate_sequence")
@Column(name = "COVT_ID", primaryKey=true)
public long getId() {
return m_id;
}
should work.