diff --git a/Distribution/Features/DeliveryRide/DeliveryTaskService.cs b/Distribution/Features/DeliveryRide/DeliveryTaskService.cs
index f31ae5a..8d589d6 100644
--- a/Distribution/Features/DeliveryRide/DeliveryTaskService.cs
+++ b/Distribution/Features/DeliveryRide/DeliveryTaskService.cs
@@ -159,13 +159,15 @@ public class DeliveryTaskService(
         {
             foreach (var item in task.Order.OrderItems.Where(i => i.QuantityFulfilled > 0))
             {
-                var vehicleBalance = await stockRepo.GetBalanceAsync(item.FK_ItemId, vehicleId)
-                    ?? throw new InvalidOperationException($"No vehicle stock found for item {item.FK_ItemId}");
+                var vehicleBalance = await stockRepo.GetBalanceAsync(item.FK_ItemId, vehicleId);
+                var availableQuantity = vehicleBalance?.Quantity ?? 0;
+                var itemName = item.Item?.Name ?? item.FK_ItemId.ToString();
 
-                if (vehicleBalance.Quantity < item.QuantityFulfilled)
-                    throw new InvalidOperationException($"Insufficient vehicle stock for item {item.FK_ItemId}");
+                if (availableQuantity < item.QuantityFulfilled)
+                    throw new InvalidOperationException(
+                        $"Insufficient vehicle stock for item '{itemName}': available {availableQuantity}, required {item.QuantityFulfilled}");
 
-                vehicleBalance.Quantity -= item.QuantityFulfilled;
+                vehicleBalance!.Quantity -= item.QuantityFulfilled;
                 vehicleBalance.UpdatedAt = DateTime.Now;
                 stockRepo.UpdateBalance(vehicleBalance);