double user agents

@wazifalab The no. of user agents doesn’t affect your site. Each user agent directive only applies to the rules that follows them. See documentation page where two user agents are present
https://developers.google.com/search/docs/crawling-indexing/robots/create-robots-txt

By default, there is no robots.txt file in WP setup. Mostly SEO plugins create them. What if the plugin that created it, also removes it in later stage? The Disallow rule will be there without any user agent.

If you want to remove the rules added by WP Optimize, add the following code in your theme’s functions.php

add_action('after_setup_theme', 'ab123_remove_robots_txt_entry');
function ab123_remove_robots_txt_entry() {
  if (function_exists('WP_Optimize')) {
    remove_filter('robots_txt', array(WP_Optimize(), 'robots_txt'), 99, 1);
  }
}