I am using an ML.NET regression model for predicting time series data, yes I know there is class specifically for time series but I need it to have a comparison in my thesis. But when I change the model or even remove it the predicted value does not change.
here is the class with the model:

internal class FastTree
{
    internal static List<SingleValueForecast> predict(List<Value> trainData, int scope)
    {
        var context = new MLContext();
        var data = context.Data.LoadFromEnumerable(trainData);
        var pipeline = context.Transforms.CopyColumns("Label", "zatizeniCerpani")
            .Append(context.Transforms.Concatenate("Features", "Year", "Month", "Day","Hour"))
            .Append(context.Regression.Trainers.FastTree("Label", "Features"));
        var model = pipeline.Fit(data);
        var predictionEngine = context.Model.CreatePredictionEngine<Value, SingleValueForecast>(model);
        var forecasts = new List<SingleValueForecast>();
        var last = trainData.Last();
        forecasts.Add( new SingleValueForecast(last.date,last.zatizeniCerpani));
        for (int i = 0; i < scope; i++)
        {
            var input = forecasts.Last();

            var forecast = predictionEngine.Predict(input.toValue());
            forecasts.Add(forecast);
        }

        return forecasts;
    }

}

and here are the related classes:

public class Value
{
    public DateTime date { get; set; }
    public float Year { get; set; }
    public float Month { get; set; }
    public float Day { get; set; }
    public float Hour { get; set; }
    public float zatizeniCerpani { get; set; }
    public Value(DateTime date, float zatizeniCerpani)
    {
        this.date = date;
        this.zatizeniCerpani = zatizeniCerpani;
        this.Year = date.Year;
        this.Month = date.Month;
        this.Day = date.Day;
        this.Hour = date.Hour;
    }
}

public class SingleValueForecast
{
    public float Year { get; set; }
    public float Month { get; set; }
    public float Day { get; set; }
    public float Hour { get; set; }
    public float zatizeniCerpani { get; set; }
    public DateTime date { get; set; }

    public SingleValueForecast(DateTime date, float zatizeniCerpani)
    {
        this.date = date;
        this.zatizeniCerpani = zatizeniCerpani;
        this.Year = date.Year;
        this.Month = date.Month;
        this.Day = date.Day;
        this.Hour = date.Hour;
    }

    public SingleValueForecast()
    { }

    public Value toValue()
    {
        return new Value(date,zatizeniCerpani);
    }

}

I am expecting for values to change when changing the model I am using. But with any model and even without a model the values are the same.

I’d be very thankful for your help.