[ERROR] Ubuntu 18.04apt - key error 404 ip

https://stackoverflow.com/questions/58544763/404-not-found-ip-when-try-to-install-any-ros-kinetic-package

" 404 Not Found [IP: ] " when try to install any ros kinetic package

old key : 421C365BD9FF1F717815A3895523BAEEB01FA116

new key : C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654

So for solving this run the below commands:

sudo apt-key del 421C365BD9FF1F717815A3895523BAEEB01FA116

sudo -E apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654

sudo apt clean && sudo apt update