Vote cheating if session is used?

Question

PHP

Attention is a theoretical question!
Hello, let's say there is online voting, the voting session is blocked. those. If you delete the session, you can re-vote. How can this business be automated?
it comes out necessary:
​​go to the page
click on the voice button
clear the session
click on the voice button
clear the session, etc...

Answer 1

I'll tell you a secret - you can not accept a session at all, just send a request and that's it