bugfix max value in range slider

app/UI/Disk/Forms/UpdateForm.php

@@ -44,7 +44,7 @@ class UpdateForm extends BaseForm implements ClientArea
         $this->setProvider(new DiskProvider());
         $this->initFields();
         $this->loadDataToForm();
-        $diskSize = parent::getFormData()['size'];
+        $this->diskSize = parent::getFormData()['size'];
         $rangeField = $this->getField('additionalDiskSize');
         $rangeField->setMinValue($diskSize);
         $rangeField->setDefaultValue($diskSize);
@@ -72,12 +72,11 @@ class UpdateForm extends BaseForm implements ClientArea
         //entity id
         $this->addField(new Hidden("id"));
         //size
-        $diskSize = parent::getFormData()['size'];
 
         logModuleCall(
             'proxmoxCloud',
             __FUNCTION__,
-            $diskSize,
+            $this->diskSize,
             'Debug',
             $this->configuration()
         );