An insert in the main model cannot be hosted by an element in a Design Option [--if you continue it will not be added to the design option set].

public static FailureDefinitionId ConfusingHostByElementsInDesignOptionWarn { get; }

Public Shared ReadOnly Property ConfusingHostByElementsInDesignOptionWarn As FailureDefinitionId
	Get

public:
static property FailureDefinitionId^ ConfusingHostByElementsInDesignOptionWarn {
	FailureDefinitionId^ get ();
}