diff --git a/B07_DesignDetail/B07_DesignDetail_Router_Support_Io.py b/B07_DesignDetail/B07_DesignDetail_Router_Support_Io.py
index 6cb837830..bbf43700b 100644
--- a/B07_DesignDetail/B07_DesignDetail_Router_Support_Io.py
+++ b/B07_DesignDetail/B07_DesignDetail_Router_Support_Io.py
@@ -9,7 +9,7 @@ import re
 from pathlib import Path
 from typing import Any
 
-from B05_Profile.B05_Profile_Engine_Sections import cross_station, prune_stale_cross_files
+from B05_Profile.B05_Profile_Engine_Sections import cross_station, valid_cross_names
 
 logger = logging.getLogger(__name__)
 
@@ -39,7 +39,8 @@ def _cross_files(longitudinal_path: Path, longitudinal: dict[str, Any]) -> list[
     if not cross_dir.is_dir():
         raise FileNotFoundError("B06 횡단면 파일을 찾을 수 없습니다.")
     stations = longitudinal.get("stations")
-    valid_names = prune_stale_cross_files(cross_dir, stations if isinstance(stations, list) else [])
+    # 읽기는 지우지 않음 — 잔재는 걸러 읽기만(지우기는 측점을 쓰는 쪽 몫 · R26)
+    valid_names = valid_cross_names(cross_dir, stations if isinstance(stations, list) else [])
     files = sorted(cross_dir.glob("cross_*.json"))
     if valid_names:
         files = [path for path in files if path.name in valid_names]