Make posts non-sticky

You can use a simple script which you run once and remove. The idea is to replace the sticky post array with an array of the 4 desired ID’s

PHP 5.4+ version – short array syntax

add_action( 'init', function ()
{
    // Define our new array
    $stickies = [1,2,3,4]; // Change to match your own ID's

    // Update the sticky posts option
    update_option( 
        'sticky_posts', // Option name 
        $stickies // New value 
    );
}, PHP_INT_MAX );  

Pre PHP5.4 version

add_action( 'init', function ()
{
    // Define our new array
    $stickies = array( 1,2,3,4 ); // Change to match your own ID's

    // Update the sticky posts option
    update_option( 
        'sticky_posts', // Option name 
        $stickies // New value 
    );
}, PHP_INT_MAX );