Index: /mods/wpsg_mod_deliverytime.class.php
===================================================================
--- /mods/wpsg_mod_deliverytime.class.php	(revision 7732)
+++ /mods/wpsg_mod_deliverytime.class.php	(revision 7733)
@@ -158,9 +158,9 @@
 			$this->shop->update_option('wpsg_mod_deliverytime_delayTime', $_REQUEST['wpsg_mod_deliverytime_delayTime'], false, false, WPSG_SANITIZE_FLOAT);
 			
-			$this->shop->update_option('wpsg_mod_deliverytime_holiday', $_REQUEST['wpsg_mod_deliverytime_holiday'], false, false, WPSG_SANITIZE_CHECKBOX);
-			$this->shop->update_option('wpsg_mod_deliverytime_holidayStart', wpsg_xss($_REQUEST['wpsg_mod_deliverytime_holidayStart']));
-			$this->shop->update_option('wpsg_mod_deliverytime_holidayEnd', wpsg_xss($_REQUEST['wpsg_mod_deliverytime_holidayEnd']));
-			$this->shop->update_option('wpsg_mod_deliverytime_holidaytext', $_REQUEST['wpsg_mod_deliverytime_holidaytext'], false, false, WPSG_SANITIZE_TEXTFIELD);
-			$this->shop->update_option('wpsg_mod_deliverytime_productindex', $_REQUEST['wpsg_mod_deliverytime_productindex'], false, false, WPSG_SANITIZE_CHECKBOX);
+			$this->shop->update_option('wpsg_mod_deliverytime_holiday', $_REQUEST['wpsg_mod_deliverytime_holiday'], false, false, WPSG_SANITIZE_CHECKBOX, ['allowEmpty' => true]);
+			$this->shop->update_option('wpsg_mod_deliverytime_holidayStart', wpsg_xss($_REQUEST['wpsg_mod_deliverytime_holidayStart']), ['allowEmpty' => true]);
+			$this->shop->update_option('wpsg_mod_deliverytime_holidayEnd', wpsg_xss($_REQUEST['wpsg_mod_deliverytime_holidayEnd']), ['allowEmpty' => true]);
+			$this->shop->update_option('wpsg_mod_deliverytime_holidaytext', $_REQUEST['wpsg_mod_deliverytime_holidaytext'], false, false, WPSG_SANITIZE_TEXTFIELD, ['allowEmpty' => true]);
+			$this->shop->update_option('wpsg_mod_deliverytime_productindex', $_REQUEST['wpsg_mod_deliverytime_productindex'], false, false, WPSG_SANITIZE_CHECKBOX, ['allowEmpty' => true]);
 			
 			$this->shop->addTranslationString('wpsg_mod_deliverytime_mode_select_values', wpsg_sinput(WPSG_SANITIZE_TEXTFIELD, $_REQUEST['wpsg_mod_deliverytime_mode_select_values']));
@@ -182,5 +182,5 @@
 
 		    //$produkt_data['wpsg_mod_deliverytime_delay'] = wpsg_q(wpsg_sinput(WPSG_SANITIZE_VALUES, ['0, 1, 2'], wpsg_getStr($_REQUEST['wpsg_mod_deliverytime']['wpsg_mod_deliverytime_delay'])));
-            wpsg_checkRequest(
+            if (isset($_REQUEST['wpsg_mod_deliverytime_delay'])) wpsg_checkRequest(
                 'wpsg_mod_deliverytime_delay',
                 [WPSG_SANITIZE_VALUES, ['0', '1', '2']],