diff --git a/src/services/supabase/orderGroupRepository.js b/src/services/supabase/orderGroupRepository.js
index aabe4d2..4c91ed6 100644
--- a/src/services/supabase/orderGroupRepository.js
+++ b/src/services/supabase/orderGroupRepository.js
@@ -222,13 +222,27 @@ export const assignDriverToOrderGroup = async ({
     logger.debug("[assignDriver] orderGroupId:", orderGroupId, "driverId:", driverId);
 
     // Direct UPDATE — RLS allows manager/logistician/admin
+    const { data: currentGroup, error: fetchCurrentError } = await client
+      .from("order_groups")
+      .select("delivery_status")
+      .eq("id", orderGroupId)
+      .single();
+
+    if (fetchCurrentError) {
+      throw fetchCurrentError;
+    }
+
+    // If status is 'agreed' or beyond, keep it — don't downgrade to 'driver_assigned'
+    const keepStatus = ["agreed", "loaded", "on_route", "delivered"].includes(currentGroup.delivery_status);
+    const updates = {
+      assigned_driver_id: driverId || null,
+      delivery_status: driverId && !keepStatus ? "driver_assigned" : undefined,
+      updated_at: new Date().toISOString(),
+    };
+
     const { error: updateError } = await client
       .from("order_groups")
-      .update({
-        assigned_driver_id: driverId || null,
-        delivery_status: driverId ? "driver_assigned" : undefined,
-        updated_at: new Date().toISOString(),
-      })
+      .update(updates)
       .eq("id", orderGroupId);
 
     if (updateError) {