diff --git a/M01_MasterData/M01_MasterData_Machine.py b/M01_MasterData/M01_MasterData_Machine.py
index 6de6ac86b..4016d920b 100644
--- a/M01_MasterData/M01_MasterData_Machine.py
+++ b/M01_MasterData/M01_MasterData_Machine.py
@@ -249,7 +249,7 @@ def row(key: str) -> dict:
     r = next((x for x in _rows() if x.get("키") == key), None)
     if r is None:
         raise store.StoreError(404, f"없는 기계 「{key}」")
-    return {"version": store.read(FILE)[1], "row": r}
+    return {"version": store.version(FILE), "row": r}  # 판만(826-2)
 
 
 # ── 저장 전 손질(`Store_Make.save` 가 부름) ──────────────────────────
diff --git a/M01_MasterData/M01_MasterData_Store_Make.py b/M01_MasterData/M01_MasterData_Store_Make.py
index 45e06762f..86b3eb86a 100644
--- a/M01_MasterData/M01_MasterData_Store_Make.py
+++ b/M01_MasterData/M01_MasterData_Store_Make.py
@@ -307,7 +307,7 @@ def save(batch: list[dict], confirmed: bool = False) -> dict:
             _make_file()
             fresh = True
             part["version"] = part.get("version") or store.read(OWN)[1]
-    before = {p["file"]: _file_keys(p["file"]) for p in batch}
+    before = {p["file"]: set(_file_keys(p["file"])) for p in batch}  # 자재 3만 키 — 목록 찾기 금지
     try:
         files = store.save(batch)
     except store.StoreError:
diff --git a/resources/master_data/scripts/master_machine_files.py b/resources/master_data/scripts/master_machine_files.py
index c133b8abe..0325d085c 100644
--- a/resources/master_data/scripts/master_machine_files.py
+++ b/resources/master_data/scripts/master_machine_files.py
@@ -60,15 +60,17 @@ def _read(entry: os.DirEntry) -> tuple[bytes, object]:
 
 
 def _parts(folder: Path, shared: bool, parse=_parse) -> tuple[list[bytes], dict, list]:
-    raws, head, rows = [], {}, []
+    raws, head, rows, fresh = [], {}, [], []
     for entry in _entries(folder):
         raw, data = _read(entry)
-        data = data if shared else parse(raw)
         raws.append(entry.name.encode() + b"\0" + raw)
         if entry.name == HEAD:
-            head = data
+            head = data if shared else parse(raw)
         elif not entry.name.startswith("_"):
             rows.append(data)
+            fresh.append(raw)
+    if not shared:  # 새 사본 — 한 번에 풂(줄마다 풀기보다 빠름)
+        rows = parse(b"[" + b",".join(fresh) + b"]")
     return raws, head, rows