Got test case from Claudio:

Hi Rob, I found the problem shows only when I use
Ebean.refresh(bean).
In my code I refreshed the bean, then applied the changes from the
user interface and eventually saved the bean.
If I take out the refresh I have no errors (the refresh was misplaced,
I needed refreshMany).

I'm uploading a simple test case that shows the error, but here is the
code that fails:

Outer loaded = Ebean.find(Outer.class).findUnique();

// if commented Ebean saves correctly
Ebean.refresh(loaded);

loaded.getEmbeddedBean().setDate2(new Date());

// fails
Ebean.save(loaded);