diff --git a/packages/Webkul/BookingProduct/src/Type/Booking.php b/packages/Webkul/BookingProduct/src/Type/Booking.php
index 43528bd8f..b3508f8a2 100644
--- a/packages/Webkul/BookingProduct/src/Type/Booking.php
+++ b/packages/Webkul/BookingProduct/src/Type/Booking.php
@@ -238,6 +238,7 @@ class Booking extends Virtual
         }
 
         if (isset($options1['booking'], $options2['booking'])
+            && isset($options1['booking']['ticket_id'], $options2['booking']['ticket_id'])
             && $options1['booking']['ticket_id'] === $options2['booking']['ticket_id']) {
                 return true;
         }