diff --git a/backend/migration/migrate_crm_orders.py b/backend/migration/migrate_crm_orders.py
index 7f67355..57f2f97 100644
--- a/backend/migration/migrate_crm_orders.py
+++ b/backend/migration/migrate_crm_orders.py
@@ -90,7 +90,7 @@ async def run() -> None:
             skipped += 1
             continue
 
-        order_number = d.get("order_number") or f"ORD-LEGACY-{doc.id[:8]}"
+        order_number = d.get("order_number") or f"ORD-LEGACY-{doc.id}"
 
         created_at = _coerce_dt(d.get("created_at")) or _now_utc()
         updated_at = _coerce_dt(d.get("updated_at")) or _now_utc()