diff --git a/app/Repositories/Shop/Customers.php b/app/Repositories/Shop/Customers.php
index 04be4e4f..22460b53 100644
--- a/app/Repositories/Shop/Customers.php
+++ b/app/Repositories/Shop/Customers.php
@@ -102,8 +102,8 @@ class Customers
     public static function storeFull($data)
     {
         $data2 = $data;
-        if ($data['sale_channels'] ?? false) {
-            $saleChannels = $data['sale_channels'] ?? false;
+        $saleChannels = array_key_exists('sale_channels', $data) ? $data['sale_channels'] : null;
+        if ($saleChannels !== null) {
             unset($data['sale_channels']);
         }
         if ($data['deliveries'] ?? false) {
@@ -113,7 +113,9 @@ class Customers
             unset($data['invoices']);
         }
         $customer = self::store($data);
-        $customer->sale_channels()->sync($saleChannels);
+        if ($saleChannels !== null) {
+            $customer->sale_channels()->sync($saleChannels);
+        }
         CustomerAddresses::storeByCustomer($customer, $data2);
 
         return $customer->id;