Remove duplicate tickets from the seating plan page

Author: mintopia

app/Http/Controllers/SeatingPlanController.php

@@ -89,6 +89,9 @@ public function show(Request $request, Event $event, ?Ticket $ticket = null)
                 }
             }
         }
+        
+        $responsibleTickets = array_unique($responsibleTickets);
+        $responsibleSeats = array_unique($responsibleSeats);
 
         // Now our seat data
         $seats = [];