diff --git a/frontend/components/admin/dashboard/widgets/ListWidgetConfigSidebar.tsx b/frontend/components/admin/dashboard/widgets/ListWidgetConfigSidebar.tsx
index 62db5cef..cd72b044 100644
--- a/frontend/components/admin/dashboard/widgets/ListWidgetConfigSidebar.tsx
+++ b/frontend/components/admin/dashboard/widgets/ListWidgetConfigSidebar.tsx
@@ -94,24 +94,19 @@ export function ListWidgetConfigSidebar({ element, isOpen, onClose, onApply }: L
   const handleQueryTest = useCallback((result: QueryResult) => {
     setQueryResult(result);
 
-    // 쿼리 결과의 컬럼을 자동으로 listConfig.columns에 추가 (기존 컬럼은 유지)
-    setListConfig((prev) => {
-      const existingFields = prev.columns.map((col) => col.field);
-      const newColumns = result.columns
-        .filter((col) => !existingFields.includes(col))
-        .map((col, idx) => ({
-          id: `col_${Date.now()}_${idx}`,
-          field: col,
-          label: col,
-          visible: true,
-          align: "left" as const,
-        }));
+    // 쿼리 실행 시마다 컬럼 설정 초기화 (새로운 쿼리 결과로 덮어쓰기)
+    const newColumns = result.columns.map((col, idx) => ({
+      id: `col_${Date.now()}_${idx}`,
+      field: col,
+      label: col,
+      visible: true,
+      align: "left" as const,
+    }));
 
-      return {
-        ...prev,
-        columns: [...prev.columns, ...newColumns],
-      };
-    });
+    setListConfig((prev) => ({
+      ...prev,
+      columns: newColumns,
+    }));
   }, []);
 
   // 컬럼 설정 변경