Hi,
I use optimistic lock to prevent concurrent update,
configured like this:
<class name="Cls" table="tbl" optimistic-lock="version" >
...
<version name="version" column="version" />
<property name="created" column="createdTS" type="timestamp" generated="always" />
...

But even if I only read the record the version number increased
I read it like this for example:

Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Criteria criteria =session.createCriteria(Cls.class);
criteria.list();
session.getTransaction().commit();

What is wrong with my config or code?
Why the version numbere incresed every time.
Thank you.

One of the field used a custom UserType, which caused the problem