Question Problem with controlling 2 joysticks at a same time. (mobile)

I want to use 2 joysticks for my android game, currently I can control only 1 at a time after building the app.
I added this code to CustomDeviceUsages.cs

Code (CSharp):

1.         InputSystem.RegisterLayoutOverride(@"
2.            {
3.                ""name"" : ""GamepadPlayerUsageTags"",
4.                ""extend"" : ""Gamepad"",
5.                ""commonUsages"" : [
6.                    ""p1_Left"", ""p1_Right""
7.                ]
8.            }
9.        ");
10.  

Code (CSharp):

1.     private Gamepad p1_Left;
2.     private Gamepad p1_Right;
3.   protected void OnEnable()
4.     {
5.         InputSystem.AddDeviceUsage(p1_Left, "p1_Left");
6.         InputSystem.AddDeviceUsage(p1_Right, "p1_Right");
7.  
8.     }

I set control paths to On-Screen Stick components accordingly but I am getting this error after running the game:

Cannot find control with path '<Gamepad>{p1_left}/leftStick' on device of type 'Gamepad' referenced by component 'OnScreenStick'
Cannot find control with path '<Gamepad>{p1_Right}/rightStick' on device of type 'Gamepad' referenced by component 'OnScreenStick'

What am I doing wrong here?