I have the same question. I want to clone my primary site. How to do this?

Hey, I just cloned primary site with this plugin. Looks good so far!
https://wordpress.org/plugins/ns-cloner-site-copier/

Had to dig for this. Bizarre not to explain the use of the plugin’s hooks. Here is an example. It will go in your theme’s functions.php file:

function mucd_primary_table_to_copy($primary_tables) {
    $primary_tables[] = 'frm_fields';
    $primary_tables[] = 'frm_forms';
    $primary_tables[] = 'frm_items';
    $primary_tables[] = 'frm_item_metas';
    return $primary_tables;
}

add_filter('mucd_default_primary_tables_to_copy', 'mucd_primary_table_to_copy');