How to remove duplicate pages (smart.filter)?

Question

CMS

There is a catalog leo-rossi.ru/catalog , there is smart.filter, which filters goods with the CNC, the fact is that you can add your left parameter.
For example, if you add the /r124r3r423/ parameter to the page (
i.e. , a link with a dummy parameter ), then everything is finely filtered and a duplicate of the page is obtained.
It is necessary either to somehow define the canonical page (I don’t know how to get the fields by which we are currently filtering from smart.filter, especially in the same CNC format as in the url), or issue a 404 page based on the same data from smart.filter as in the 1st solution. How to solve this problem, experts?
Everyone, thanks in advance! And happy first day of winter :P

Answer 1

You don't have to delete pages.
All these options will not help you for promotion in general, if there are no separate titles and descriptions. So you can hide all filter links in robots.