Hibernate Envers: Auditing an object, calling merge on it, gives an audit record EVERY time even with no change? -

Hibernate Envers: Auditing an object, calling merge on it, gives an audit record EVERY time even with no change? -

as in title. expect envers insert audit record if info has changed (have tried help envers along providing equals , hashcode methods) - not come standard?

many thanks

hibernate-envers