Creating Lab SPOT color swatch

Hello Everyone,

I have to create the SPOT color swatch with the Lab values. Also drafted the script, but it showing some error while running and unable to figure out the problem with my Script.

Please help me to overcome this issue, and also attaching the script.

docRef = app.activeDocument;
var color12 = new LabColor();
color12.l = 17;
color12.a = 1;
color12.b = 3;
var spot = docRef.spots.add();
spot.name = "PANTONE Black C";
spot.colorType = ColorModel.SPOT;
spot.color = color12;