diff --git a/workplans/CUST-WP-0050-repo-classification-registration-redesign.md b/workplans/CUST-WP-0050-repo-classification-registration-redesign.md
index 31bd018..7e661d0 100644
--- a/workplans/CUST-WP-0050-repo-classification-registration-redesign.md
+++ b/workplans/CUST-WP-0050-repo-classification-registration-redesign.md
@@ -93,7 +93,7 @@ Per the 2026-06-22 steering decision, this redesign **flips the polarity**: the
   becomes a thin strategic rollup keyed by the 14 market domains.
 - **Cross-repo workplans** anchor to a dedicated **project repo** that retires to
   archive on completion, with results living on in the modified product repos —
-  see **ADR-005** and Open Question D1.
+  see **ADR-005** and Open Questions D1/D1a.
 
 This is consistent with ADR-001: the spine becomes the git-managed repo plus its
 committed classification file, so the Hub stays fully rebuildable from repo-owned