diff --git a/B05_Profile/B05_Profile_Route_Save.py b/B05_Profile/B05_Profile_Route_Save.py
index 4799577d6..db3b15115 100644
--- a/B05_Profile/B05_Profile_Route_Save.py
+++ b/B05_Profile/B05_Profile_Route_Save.py
@@ -466,7 +466,8 @@ async def run_route_save_chain(
             relative,
             old_long,
             old_designs,
-            old_pipes,
+            # 옛 관 = 옛 노선 누가거리(B05 가 읽는 자리 · 정본은 다른 선 누가거리일 수 있음 · 459)
+            [pipe for _, pipe in follow_pipes(old_pipes, vertices_of(old_xy))],
             old_structures,
             pairs,
             float(seed["station_interval_m"]),