Can't change background of second camera

Phaser 3
1

Hey! I added a second camera to my scene but I can’t change the background as I do with the main one. Am I missing something? Thanks!

image
image1920×1080 298 KB 

this.camera = this.cameras.main;
this.camera.setSize(240,270);
this.camera.setBackgroundColor('rgba(21, 7, 4, 1)');
this.camera.setRenderToTexture(customPipeline);

this.camera1 = this.cameras.add(240, 0, 240, 270);
this.camera1.setBackgroundColor('rgba(21, 7, 4, 1)');
this.camera1.setRenderToTexture(customPipeline);
2

When you adding a new camera, its will auto duplicate rendering. Then you should ignore one of them before it can use properly. Ex. ignore the background at the main
cmiiw