diff --git a/packages/Webkul/Sales/src/Repositories/OrderRepository.php b/packages/Webkul/Sales/src/Repositories/OrderRepository.php
index a115d4dc6..46ab1a14a 100755
--- a/packages/Webkul/Sales/src/Repositories/OrderRepository.php
+++ b/packages/Webkul/Sales/src/Repositories/OrderRepository.php
@@ -149,9 +149,12 @@ class OrderRepository extends Repository
     public function generateIncrementId()
     {
         $config = new CoreConfig();
-        $invoiceNumberPrefix = $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_prefix")->first()->value;
-        $invoiceNumberLength = $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_length")->first()->value;
-        $invoiceNumberSuffix = $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_suffix")->first()->value;
+        $invoiceNumberPrefix = $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_prefix")->first()
+            ? $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_prefix")->first()->value : false;
+        $invoiceNumberLength = $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_length")->first()
+            ? $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_length")->first()->value : false;
+        $invoiceNumberSuffix = $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_suffix")->first()
+            ? $config->where('code','=',"sales.invoiceSettings.invoice_number.invoice_number_suffix")->value: false;
 
         $lastOrder = $this->model->orderBy('id', 'desc')->limit(1)->first();
         $lastId = $lastOrder ? $lastOrder->id : 0;