Canada warns you when a point of law in a case or administrative has been undermined because it relies on an overruled or otherwise invalid prior decision.
You'll find the Overruling Risk icon in several places:
In search results next to affected cases
When viewing a case, next to the name of the affected case
Next to paragraphs within cases that are most at risk of having compromised points of law. In addition to the icon, orange brackets will show you the affected paragraphs