Hi Alfred Ortega,
You are right there. The wizard currently does not generate the version field and also overwrites the changes after the merge.
Currently only the correct mapping entries to use it are generated. This is by design.
We will be providing an option to generate the version field.
As a workaround, you can add the field and Persistent attribute to the 'user' file (Classname.cs) but would need to remove the 'Persistent' attribute from the designer file if you regenerate the class.
the Telerik team