diff --git a/B06_Section/B06_Section_Router_Confirm.py b/B06_Section/B06_Section_Router_Confirm.py
index ea915f03..ac43045f 100644
--- a/B06_Section/B06_Section_Router_Confirm.py
+++ b/B06_Section/B06_Section_Router_Confirm.py
@@ -33,7 +33,12 @@ from B06_Section.B06_Section_Repository import (
     merge_longitudinal_section_options,
     update_cross_section_design,
 )
-from B06_Section.B06_Section_Router import _compute_default_designs
+
+# 원본은 `B06_Section_Router_Design` 이다 — `B06_Section_Router` 를 거쳐 들여오던 것을
+# 곧바로 잇는다(2026-09-06). 그 재수출이 없어지면서 서버가 뜨지 못했다.
+from B06_Section.B06_Section_Router_Design import (
+    compute_default_designs as _compute_default_designs,
+)
 from B06_Section.B06_Section_Schema import (
     SectionConfirmRequest,
     SectionConfirmResponse,