WPF revalidate the object on any property change [Answered]

<DataGridTemplateColumn Header="Has Owner">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <CheckBox
                local:Properties.Focus="True"
                HorizontalAlignment="Center"
                VerticalAlignment="Center"
                IsChecked="{Binding HasOwner, Mode=TwoWay, ValidatesOnDataErrors=True}"
                />
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
    
<DataGridTemplateColumn Header="Owner First Name">
    <DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <TextBox
                local:Properties.Focus="True"
                Text="{Binding Owner_FirstName, Mode=TwoWay, ValidatesOnDataErrors=True}"
                IsEnabled="{Binding HasOwner}"
                Validation.ErrorTemplate="{StaticResource validationTemplate}"
                />
        </DataTemplate>
    </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

[MarkupExtensionReturnType(typeof(Binding))]
public class ReactiveBinding : MarkupExtension
{
    public string Path { get; set; }
    public string StringFormat { get; set; }

    public ReactiveBinding(string path)
    {
        Path = path;

    }

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        return new Binding(Path)
        {
            Mode = BindingMode.TwoWay,
            ValidatesOnDataErrors = true,
            UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged,
            StringFormat = StringFormat,
        };
    }
}