diff --git a/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/11.Troubleshooting/4.troubleshooting.md b/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/11.Troubleshooting/4.troubleshooting.md
index 359ef37..a21c745 100644
--- a/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/11.Troubleshooting/4.troubleshooting.md
+++ b/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/11.Troubleshooting/4.troubleshooting.md
@@ -146,7 +146,6 @@ toc_max_heading_level: 4
   2. Run the following commands to switch from the desktop version to server version.
 
   ```shell
-  sudo add-apt-repository ppa:ubuntu-qcom-iot/qcom-noble-ppa
   sudo apt update
   sudo apt upgrade -y
   sudo apt-get install qcom-adreno1
@@ -162,7 +161,6 @@ toc_max_heading_level: 4
   2. Run the following commands to switch from the server version to desktop version.
 
   ```shell
-  sudo add-apt-repository ppa:ubuntu-qcom-iot/qcom-noble-ppa
   sudo apt update
   sudo apt upgrade -y
   sudo apt install qcom-adreno1- libgbm-msm1- libegl-mesa0 libegl1 libgles2 libglvnd0 libvulkan1
diff --git a/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/7.Application Development and Execution Guide/4.Robotics-Sample-Applications/Robotics Sample Applications.md b/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/7.Application Development and Execution Guide/4.Robotics-Sample-Applications/Robotics Sample Applications.md
index f06b325..e7aab3b 100644
--- a/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/7.Application Development and Execution Guide/4.Robotics-Sample-Applications/Robotics Sample Applications.md	
+++ b/docs-en/docs/rubik-pi-3-user-manual/1.0.0-u/7.Application Development and Execution Guide/4.Robotics-Sample-Applications/Robotics Sample Applications.md	
@@ -31,7 +31,7 @@ This guide walks you through using QIR sample applications on development kits r
 4.	Add Qualcomm public PPA archives to your Ubuntu software sources: 
 
 ```shell
-sudo add-apt-repository ppa:ubuntu-qcom-iot/qcom-ppa
+sudo add-apt-repository ppa:ubuntu-qcom-iot/qcom-ppa   # qcom-ppa is usually already enabled in your system. Describe here just in case.
 sudo add-apt-repository ppa:ubuntu-qcom-iot/qirp
 ```