diff --git a/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputComponent.tsx b/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputComponent.tsx
index b50c32fe..a70d8e74 100644
--- a/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputComponent.tsx
+++ b/frontend/lib/registry/components/selected-items-detail-input/SelectedItemsDetailInputComponent.tsx
@@ -263,14 +263,14 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
   // 🆕 그룹별 필드 변경 핸들러: itemId + groupId + entryId + fieldName
   const handleFieldChange = useCallback((itemId: string, groupId: string, entryId: string, fieldName: string, value: any) => {
     setItems((prevItems) => {
-      const updatedItems = prevItems.map((item) => {
+      return prevItems.map((item) => {
         if (item.id !== itemId) return item;
         
         const groupEntries = item.fieldGroups[groupId] || [];
         const existingEntryIndex = groupEntries.findIndex((e) => e.id === entryId);
         
         if (existingEntryIndex >= 0) {
-          // 기존 entry 업데이트
+          // 기존 entry 업데이트 (항상 이 경로로만 진입)
           const updatedEntries = [...groupEntries];
           updatedEntries[existingEntryIndex] = {
             ...updatedEntries[existingEntryIndex],
@@ -284,22 +284,11 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
             },
           };
         } else {
-          // 새로운 entry 추가
-          const newEntry: GroupEntry = {
-            id: entryId,
-            [fieldName]: value,
-          };
-          return {
-            ...item,
-            fieldGroups: {
-              ...item.fieldGroups,
-              [groupId]: [...groupEntries, newEntry],
-            },
-          };
+          // 이 경로는 발생하면 안 됨 (handleAddGroupEntry에서 미리 추가함)
+          console.warn("⚠️ entry가 없는데 handleFieldChange 호출됨:", { itemId, groupId, entryId });
+          return item;
         }
       });
-      
-      return updatedItems;
     });
   }, []);
 
@@ -311,6 +300,25 @@ export const SelectedItemsDetailInputComponent: React.FC<SelectedItemsDetailInpu
   // 🆕 그룹 항목 추가 핸들러 (특정 그룹에 새 항목 추가)
   const handleAddGroupEntry = (itemId: string, groupId: string) => {
     const newEntryId = `entry-${Date.now()}`;
+    
+    // 🔧 미리 빈 entry를 추가하여 리렌더링 방지
+    setItems((prevItems) => {
+      return prevItems.map((item) => {
+        if (item.id !== itemId) return item;
+        
+        const groupEntries = item.fieldGroups[groupId] || [];
+        const newEntry: GroupEntry = { id: newEntryId };
+        
+        return {
+          ...item,
+          fieldGroups: {
+            ...item.fieldGroups,
+            [groupId]: [...groupEntries, newEntry],
+          },
+        };
+      });
+    });
+    
     setIsEditing(true);
     setEditingItemId(itemId);
     setEditingDetailId(newEntryId);