Question on cookie_prefix

[A84]

Hello!

i need to force a logout to all logged in users. Currently running 5.3.2p1

I googled a bit and it looks like changing the cookie_prefix should do the trick.

However, i notice that the /config.php file says:

// This Setting allows you to change the cookie prefix

// This must match the core/includes/config.php file cookie prefix setting

$config['cookie_prefix'] = '';

however, i currently have in my /core/includes/config.php

// Prefix that all vBulletin cookies will have
// Keep this short and only use numbers and letters, i.e. 1-9 and a-Z
$config['Misc']['cookieprefix'] = 'bb';

what should i do then? shall i change them both to bb1 , or should i leave the first one blank and change the second one to bb1 ?

thank you