Can't load Zorin 17.2 from "System tools"

You just told the user to disable or remove the Zorin OS Repositories in order to try to Upgrade Zorin OS. This will Not Go Well.

This is an excellent example of why I caution the use of A.I.

One, it can get things very wrong.

Two, people tend to be too trusting of it's suggestions, without verifying or fact checking them.