cookies

I am using GDPR Cookie consent by Web toffee. I have scanned the site and can see the 10 or so Cleantalk cookies. the first one: ct_fkp_timestamp is labelled as necessary. All the others aren’t. My guess is when a user/bot rejects the cookies only the non necessary ones will be rejected. Many of them are labelled “CleanTalk sets this cookie to complete an anti-spam solution and firewall for the website, preventing spam from appearing in comments and forms.” for example.

Can you confirm that Cleantalk will still stop spam with just the first timestamp cookie as necessary. Or do I have to make all Cleantalk cookies necessary for Cleantalk to do it’s job?