Set correct invoice numbers for zero payment invoices

app/Http/Livewire/BillingPortalPurchasev2.php

@@ -597,9 +597,14 @@ class BillingPortalPurchasev2 extends Component
             ->service()
             ->fillDefaults()
             ->adjustInventory()
-            ->markPaid()
             ->save();
 
+            $invoice->number = null;
+            
+            $invoice->service()
+                    ->markPaid()
+                    ->save();
+
             return $this->subscription
                         ->service()
                         ->handleNoPaymentFlow($invoice, $this->bundle, $this->contact);