Set default member roles

Based on the previous answer given in https://wordpress.org/support/topic/can-you-set-default-ticket-options/ I’d like to extend the snippet to also set the restriction.

I do have the following snippet, but is does not seem to work.

function my_em_add_default_tickets($tickets, $EM_Bookings) {

	$default_spaces = 9999;
    
    if ( empty($tickets->tickets) ) {
        $ticket_data = array();
        
        $ticket_data[0] = array(
        	'ticket_name' => 'Member', 
        	'ticket_description' => 'Member ticket', 
        	'ticket_spaces' => $default_spaces,
        	'ticket_price' => 0, 
        	'ticket_min' => 1, 
        	'ticket_max' => 1, 
        	'ticket_type' => 'members', 
        	'ticket_members_roles' => array("pmpro_role_2")
        );
        
        foreach ($ticket_data as $ticket) {
            
            $EM_Ticket = new EM_ticket();
            $EM_Ticket->ticket_name = $ticket['ticket_name'];
            $EM_Ticket->ticket_description = $ticket['ticket_description'];
            $EM_Ticket->ticket_spaces = $ticket['ticket_spaces']; 
            $EM_Ticket->ticket_price = $ticket['ticket_price'];
            $EM_Ticket->ticket_min = $ticket['ticket_min']; 
            $EM_Ticket->ticket_max = $ticket['ticket_max']; 
            if($ticket['ticket_type'] == "member") {
            	$EM_Ticket->ticket_members = true;
            	$EM_Ticket->ticket_members_roles = $ticket['ticket_members_roles'];
            }
            if($ticket['ticket_type'] == "guest") {
            	$EM_Ticket->ticket_guests = true;
            }
            
            $tickets->tickets[] = $EM_Ticket;
        }
    }
    
    return $tickets;
}
add_filter('em_bookings_get_tickets', 'my_em_add_default_tickets', 100, 2);