How to remove s: from express-session session ID cookie?

Question

Express.js

For security purposes, express-sessionthere is a setting namethat allows you to change the cookie name in order to make it harder for an attacker to identify the source of a potential vulnerability (in this case, Express). But what is the point in these manipulations, if this express-sessionone shoves cookies at the beginning s:(apparently to simplify subsequent parsing).
Is there an option to overwrite this? I tried to generate my IDs. IDs are generated, but s:are still inserted at the beginning.