Hi,

What "crashes" exactly means? What is the error?

Also this should be removed from wpForo pages.

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Hi @aar,

Use PhpMyAdmin plugin or the same tool in your hosting cPanel, go to the SQL tab and execute the following SQL. Make sure you have a backup of your database. Also, please make sure your table prefix is wp_, if it isn't, change all red marked wp_ prefixes to yours.

DELETE u, um, p FROM wp_users u
   INNER JOIN wp_wpforo_profiles p ON p.`userid`   = u.`ID`
       LEFT JOIN wp_usermeta    um ON um.`user_id` = u.`ID`
WHERE p.`posts` = 0
AND u.`ID` NOT IN( SELECT DISTINCT `post_author` FROM wp_posts )
AND p.status = 'inactive'