asp.net razor WebGrid: "Column 'ItemTable.ItemName' does not exist.

Hi,

I'm using a WebGrid to create a table in my ASP.NET MVC - project.

Here is my EF model:

I keep getting av exception in one of my collumns in my WebGrid:

I know that some of the OrderLines (from table "v_OrderLines") doesnt have any corresponding ItemTable data.
It this the reason? and how do I solve this?

Regards,

Marius H Enerud