apt-get 404 not found issues (armhf) after installing Jetpack 1.2

Robotics & Edge Computing Jetson & Embedded Systems Jetson TK1
1

Greetings,

After I installed Jetpack 1.2, I am getting error messages when doing an apt-get update.

They are all related to armhf packages.

Here are some examples.

Err http://security.ubuntu.com trusty-security/main armhf Packages             
  404  Not Found [IP: 91.189.92.200 80]
Err http://security.ubuntu.com trusty-security/restricted armhf Packages
  404  Not Found [IP: 91.189.92.200 80]
Err http://security.ubuntu.com trusty-security/universe armhf Packages
  404  Not Found [IP: 91.189.92.200 80]
Err http://security.ubuntu.com trusty-security/multiverse armhf Packages

Can someone please give me some pointers on how to solve this?

Thanks in advance

G