diff --git a/core/api/api/routes_crm.py b/core/api/api/routes_crm.py
index aa70953..4716661 100644
--- a/core/api/api/routes_crm.py
+++ b/core/api/api/routes_crm.py
@@ -454,13 +454,18 @@ def _relative_time_label(value: Any) -> str:
 
 
 def _kanban_stage_payload(stage_id: str, label: str, emoji: str, leads: list[dict[str, Any]]) -> dict[str, Any]:
+    def lead_route_id(lead: dict[str, Any]) -> str:
+        metadata = lead.get("metadata") or {}
+        return str(metadata.get("canonical_person_id") or lead["id"])
+
     return {
         "id": stage_id,
         "label": label,
         "emoji": emoji,
         "leads": [
             {
-                "id": lead["id"],
+                "id": lead_route_id(lead),
+                "legacyId": lead["id"],
                 "name": lead["name"],
                 "location": lead.get("unit_interest") or lead.get("budget") or lead.get("source"),
                 "qdScore": int(lead.get("score") or 0),