Cannot use Session.Lock with Version column on abstract base class

When a version column is on an abstract base class and a joined subclass is used, when trying to use Session.Lock(entity, LockMode.Force) where entity is an instance of the subclass the incorrect SQL is generated.

The statement to try and increment the version number creates an update statement with the table name for the base class as expected, but the id column name as the column name from the sub-class table.

I believe the issue is in:

• NHibernate.Persister.Entity.AbstractEntityPersister#GenerateVersionIncrementUpdateString()