Disabling the editing of an ACF field

disabling-acf-field-editing.php

<?php

// Disabling the editing of an ACF field
add_filter('acf/load_field', 'my_acf_load_field');
function my_acf_load_field($field) {
    // Check if the field is named "event_id"
    if ($field['name'] == 'event_id') {
        // Set the "readonly" attribute to true
        $field['readonly'] = true;
    }
    return $field;
}

?>