bugfix

app/Libs/Zimbra/Components/Api/Soap/Services/Update/ChangePackage.php

@@ -70,7 +70,7 @@ class ChangePackage extends ApiService
                 $configOption->updateConfigurableOption($acc_newObj->id, ['qty' => $acc_new]);
             }
         } else {
-            $accountLimit = $acc_limit;
+            $accountLimit = $this->productManager->get('acc_limit');
         }
         foreach($accounts as $account)
         {