How can I disable masked object shadow with DepthMask shader

Hey there,

I'm using DepthMask shader from Unity wiki as ;

 Shader "Masked/Mask" {
      SubShader {
       Tags {"Queue" = "Geometry+1"}
       
       ZTest LEqual
       ZWrite On
       ColorMask 0
       
       Pass {}
      }
 }

Then, I'm setting renderQueue of the object that will be masked with a helper script as ;

 void Awake() {
     var renderers = GetComponentsInChildren<Renderer>();
     foreach (var randr in renderers) {
         randr.material.renderQueue = 2002;
     }
 }

With that setup I'm able to mask gameobjects part of screen. But there is a problem I'm keep getting shadows of those invisible objects here is the screenshot ;

I would like to know if there is a way get rid of shadows of masked objects. I'm using Deferred Lighting mode as Rendering Path.