diff --git a/app/Invoice/Actions/MassStoreAction.php b/app/Invoice/Actions/MassStoreAction.php
index 2ac28196..d11b8ea4 100644
--- a/app/Invoice/Actions/MassStoreAction.php
+++ b/app/Invoice/Actions/MassStoreAction.php
@@ -43,7 +43,7 @@ class MassStoreAction
 
             $invoice = Invoice::createFromFactory($factory);
             $invoice->save();
-            $invoice->positions()->createMany($invoice->positions);
+            $invoice->positions()->createMany($invoice->positions->toArray());
             $invoices->push($invoice->fresh('positions'));
         }