How to delete _pk_id and _pk_ses cookies?

Data collection and tags
1

I’m trying to delete these cookies when users revoke the required consent, but unable to delete. What could be the reason?

2

how are you trying to delete those cookies? There is a function to achieve that:

paq.push(["deleteCookies"]);

you can also check if cookies are present, disable them so no new cookies are created with the next tracking request and a few other things. API — Piwik PRO Analytics Suite 16.33 documentation has everything you need to know.

Hope that helps,

best,
Markus