In all ControlDraw models, Page 1 should follow certain rules if the model is to be used for data storage as well as just diagrams:

Page 1 is the Contents page and so it should

Have Parent Links to child pages.

Contain Top level Classes, IE the classes of the objects on this page should be at the top of the hierarchy

The Classes of Symbols that are connected to child pages should be Included in Tables

Page 1  check also checks that there are no objects with the same class as those on page 1 in the rest of the model

See also Non Included Parent Classes