diff --git a/M01_MasterData/M01_MasterData_UI_LogicLab.ts b/M01_MasterData/M01_MasterData_UI_LogicLab.ts
index caa1bf19c..14210902b 100644
--- a/M01_MasterData/M01_MasterData_UI_LogicLab.ts
+++ b/M01_MasterData/M01_MasterData_UI_LogicLab.ts
@@ -394,16 +394,16 @@ export async function mountM01LogicLab(
     }
     showLoadingOverlay();
     try {
-      await saveFiles([...byFile.values()]);
+      // 키 없는 새 줄은 서버가 새 키를 줌(added) — 저장 뒤 그 로직을 엶
+      const saved = (await saveFiles([...byFile.values()])) as {
+        added?: { file: string; key: string }[];
+      };
       const was = opened;
-      const before = new Set(allLogics.map((x) => x.키));
       drafts = {};
       await reload();
       showToast(tx("Save_Done"), "success");
-      const made =
-        was?.row && !was.row.키
-          ? allLogics.find((x) => !before.has(x.키) && x.이름 === was.row?.이름)
-          : undefined;
+      const newKey = was?.row && !was.row.키 ? saved.added?.at(-1)?.key : undefined;
+      const made = newKey ? allLogics.find((x) => x.키 === newKey) : undefined;
       if (made) await open(logicId(made.구분, made.키), made.구분, made.키);
       else if (was?.row?.키) await open(logicId(was.sub, was.row.키), was.sub, was.row.키);
       else show(null);