Using applyPreset on duplicated layer in Script

Hi. I'm having some strange behavior when I use applyPreset on a duplicated layer. I have a duplicated layer,  and I use applyPreset on it, but the preset is applied to the originial layer:

var originalLayer = app.project.activeItem.layers[1];
var duplicatedLayer = originalLayer.duplicate();

var presetFile = new File("the/path/to/my/preset");

duplicatedLayer.applyPreset(presetFile); //The preset is applied on originalLayer

Is this a normal behavior? If it is, is there a workarround?