INotifyPropertyChanged with Inheritance

[Kebechet]

Hello I have a DTO class that is retrieved from the backend:

public class TrainingDayDurationDto {
	public DateOnly Date { get; set; }
	public short DurationMinutes { get; set; }

	public TrainingDayDurationDto(DateOnly date, short durationMinutes) {
		Date = date;
		DurationMinutes = durationMinutes;
	}
}

then on the frontend I map this DTO to client specific object that can have frontend specific functionality/properties added, so I have:

[INotifyPropertyChanged]
public sealed partial class TrainingDayDuration : TrainingDayDurationDto {
	[ObservableProperty] private DateOnly _date;
	[ObservableProperty] private short _durationMinutes;

	public TrainingDayDuration(DateOnly date, short durationMinutes) : base(date, durationMinutes) {
	}
}

I expected then auto-generated properties for TrainingDayDuration will override those from parent object, but it doesnt seem to be the case. Because in debugger I can see 2 Date and 2 DurationMinutes properties like:

What is the right way to override it ?
Or is there a better way how to approach this whole thing ?