visual studio 2010 - Entity Framework insert error ("The Version field is required.") -

I am using Silverlight 4 and RIA services when I try to include in my database, The following error is found:

"The operation operation failed. Please inspect Entity.ValidationErrors for each unit in EntityInError for excess."

By inspecting ValidationErrors, I see:

"Version field is required."

The version field is up-to-date and maintained by the framework? If so, why is it empty? If not, how should I set it? This is apparently a bug in Silverlight 4 Hopefully it will be fixed in the final release.