diff --git a/engine.py b/engine.py
index 13ce31c..9c9f6cd 100644
--- a/engine.py
+++ b/engine.py
@@ -551,6 +551,8 @@ class PickupEngine:
             return
 
         if self._product_choice is not None:
+            if self._product_detail:
+                return
             biz_id = self._product_choice.get("productId", "")
             biz_no = self._product_choice.get("bizProductNo", "")
             if biz_id and biz_no:
@@ -595,6 +597,8 @@ class PickupEngine:
             return
 
         if self._customer_choice is not None:
+            if self._customer_detail:
+                return
             cust_id = self._customer_choice.get("customerId", "")
             if cust_id:
                 self._customer_detail = self._api.select_customer(str(cust_id))