diff --git a/frontend/components/numbering-rule/NumberingRuleDesigner.tsx b/frontend/components/numbering-rule/NumberingRuleDesigner.tsx
index 2ab42e75..9320f00e 100644
--- a/frontend/components/numbering-rule/NumberingRuleDesigner.tsx
+++ b/frontend/components/numbering-rule/NumberingRuleDesigner.tsx
@@ -260,22 +260,24 @@ export const NumberingRuleDesigner: React.FC<NumberingRuleDesignerProps> = ({
     toast.success(`규칙 ${newPart.order}가 추가되었습니다`);
   }, [currentRule, maxRules]);
 
-  const handleUpdatePart = useCallback((partId: string, updates: Partial<NumberingRulePart>) => {
+  // partOrder 기반으로 파트 업데이트 (id가 null일 수 있으므로 order 사용)
+  const handleUpdatePart = useCallback((partOrder: number, updates: Partial<NumberingRulePart>) => {
     setCurrentRule((prev) => {
       if (!prev) return null;
       return {
         ...prev,
-        parts: prev.parts.map((part) => (part.id === partId ? { ...part, ...updates } : part)),
+        parts: prev.parts.map((part) => (part.order === partOrder ? { ...part, ...updates } : part)),
       };
     });
   }, []);
 
-  const handleDeletePart = useCallback((partId: string) => {
+  // partOrder 기반으로 파트 삭제 (id가 null일 수 있으므로 order 사용)
+  const handleDeletePart = useCallback((partOrder: number) => {
     setCurrentRule((prev) => {
       if (!prev) return null;
       return {
         ...prev,
-        parts: prev.parts.filter((part) => part.id !== partId).map((part, index) => ({ ...part, order: index + 1 })),
+        parts: prev.parts.filter((part) => part.order !== partOrder).map((part, index) => ({ ...part, order: index + 1 })),
       };
     });
 
@@ -295,8 +297,6 @@ export const NumberingRuleDesigner: React.FC<NumberingRuleDesignerProps> = ({
 
     setLoading(true);
     try {
-      const existing = savedRules.find((r) => r.ruleId === currentRule.ruleId);
-
       // 파트별 기본 autoConfig 정의
       const defaultAutoConfigs: Record<string, any> = {
         sequence: { sequenceLength: 3, startFrom: 1 },
@@ -345,15 +345,30 @@ export const NumberingRuleDesigner: React.FC<NumberingRuleDesignerProps> = ({
       const response = await saveNumberingRuleToTest(ruleToSave);
 
       if (response.success && response.data) {
+        // 깊은 복사하여 savedRules와 currentRule이 다른 객체를 참조하도록 함
+        const currentData = JSON.parse(JSON.stringify(response.data)) as NumberingRuleConfig;
+        
+        // setSavedRules 내부에서 prev를 사용해서 existing 확인 (클로저 문제 방지)
         setSavedRules((prev) => {
-          if (existing) {
-            return prev.map((r) => (r.ruleId === ruleToSave.ruleId ? response.data! : r));
+          const savedData = JSON.parse(JSON.stringify(response.data)) as NumberingRuleConfig;
+          const existsInPrev = prev.some((r) => r.ruleId === ruleToSave.ruleId);
+          
+          console.log("🔍 [handleSave] setSavedRules:", {
+            ruleId: ruleToSave.ruleId,
+            existsInPrev,
+            prevCount: prev.length,
+          });
+          
+          if (existsInPrev) {
+            // 기존 규칙 업데이트
+            return prev.map((r) => (r.ruleId === ruleToSave.ruleId ? savedData : r));
           } else {
-            return [...prev, response.data!];
+            // 새 규칙 추가
+            return [...prev, savedData];
           }
         });
 
-        setCurrentRule(response.data);
+        setCurrentRule(currentData);
         setSelectedRuleId(response.data.ruleId);
 
         await onSave?.(response.data);
@@ -366,11 +381,27 @@ export const NumberingRuleDesigner: React.FC<NumberingRuleDesignerProps> = ({
     } finally {
       setLoading(false);
     }
-  }, [currentRule, savedRules, onSave, currentTableName]);
+  }, [currentRule, onSave, currentTableName, menuObjid]);
 
   const handleSelectRule = useCallback((rule: NumberingRuleConfig) => {
+    console.log("🔍 [handleSelectRule] 규칙 선택:", {
+      ruleId: rule.ruleId,
+      ruleName: rule.ruleName,
+      partsCount: rule.parts?.length || 0,
+      parts: rule.parts?.map(p => ({ id: p.id, order: p.order, partType: p.partType })),
+    });
+    
     setSelectedRuleId(rule.ruleId);
-    setCurrentRule(rule);
+    // 깊은 복사하여 객체 참조 분리 (좌측 목록과 편집 영역의 객체가 공유되지 않도록)
+    const ruleCopy = JSON.parse(JSON.stringify(rule)) as NumberingRuleConfig;
+    
+    console.log("🔍 [handleSelectRule] 깊은 복사 후:", {
+      ruleId: ruleCopy.ruleId,
+      partsCount: ruleCopy.parts?.length || 0,
+      parts: ruleCopy.parts?.map(p => ({ id: p.id, order: p.order, partType: p.partType })),
+    });
+    
+    setCurrentRule(ruleCopy);
     toast.info(`"${rule.ruleName}" 규칙을 불러왔습니다`);
   }, []);
 
@@ -595,12 +626,12 @@ export const NumberingRuleDesigner: React.FC<NumberingRuleDesignerProps> = ({
                 </div>
               ) : (
                 <div className="grid grid-cols-1 gap-4 md:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 2xl:grid-cols-5">
-                  {currentRule.parts.map((part) => (
+                  {currentRule.parts.map((part, index) => (
                     <NumberingRuleCard
-                      key={part.id}
+                      key={`part-${part.order}-${index}`}
                       part={part}
-                      onUpdate={(updates) => handleUpdatePart(part.id, updates)}
-                      onDelete={() => handleDeletePart(part.id)}
+                      onUpdate={(updates) => handleUpdatePart(part.order, updates)}
+                      onDelete={() => handleDeletePart(part.order)}
                       isPreview={isPreview}
                     />
                   ))}