Tickets viewable from public google

There is an issue with your website where some tickets are viewable from a public google search. https://www.dreamlanduae.com/tickets/uploads/ Here is one example I found https://www.dreamlanduae.com/tickets/uploads/e-ticket-63bbb699c4c70.pdf&ved=2ahUKEwjokLGI19iJAxVKFFkFHR12N244ChAWegQIFBAB&usg=AOvVaw2T1ir_iXQg3tDkmml0-5rV This isn't very secure.