Index: branches/5.2.x/core/kernel/db/db_event_handler.php
===================================================================
diff -u -N -r16746 -r16779
--- branches/5.2.x/core/kernel/db/db_event_handler.php	(.../db_event_handler.php)	(revision 16746)
+++ branches/5.2.x/core/kernel/db/db_event_handler.php	(.../db_event_handler.php)	(revision 16779)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: db_event_handler.php 16746 2022-11-09 15:36:06Z alex $
+* @version	$Id: db_event_handler.php 16779 2023-11-22 09:14:46Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -131,6 +131,7 @@
 				'OnPreCreate' => Array ('self' => 'add|add.pending', 'subitem' => 'edit|edit.pending'),
 				'OnEdit' => Array ('self' => 'edit|edit.pending', 'subitem' => 'edit|edit.pending'),
 
+				'OnDeleteExportPreset' => array('self' => 'view'),
 				'OnExport' => Array ('self' => 'view|advanced:export'),
 				'OnExportBegin' => Array ('self' => 'view|advanced:export'),
 				'OnExportProgress' => Array ('self' => 'view|advanced:export'),
@@ -3082,38 +3083,22 @@
 		 */
 		protected function OnDeleteExportPreset(kEvent $event)
 		{
-			$field_values = $this->getSubmittedFields($event);
+			$delete_preset_name = $this->Application->GetVar('delete_preset_name');
 
-			if ( !$field_values ) {
-				return ;
+			if ( !$delete_preset_name ) {
+				return;
 			}
 
-			$preset_key = $field_values['ExportPresets'];
-			$export_settings = $this->Application->RecallPersistentVar('export_settings');
+			$where_clause = array(
+				'ItemPrefix = ' . $this->Conn->qstr($event->Prefix),
+				'PortalUserId = ' . $this->Application->RecallVar('user_id'),
+				'PresetName = ' . $this->Conn->qstr($delete_preset_name),
+			);
 
-			if ( !$export_settings ) {
-				return ;
-			}
-
-			$export_settings = unserialize($export_settings);
-
-			if ( !isset($export_settings[$event->Prefix]) ) {
-				return ;
-			}
-
-			$to_delete = '';
-
-			foreach ($export_settings[$event->Prefix] as $key => $val) {
-				if ( implode('|', $val['ExportColumns']) == $preset_key ) {
-					$to_delete = $key;
-					break;
-				}
-			}
-
-			if ( $to_delete ) {
-				unset($export_settings[$event->Prefix][$to_delete]);
-				$this->Application->StorePersistentVar('export_settings', serialize($export_settings));
-			}
+			$sql = 'DELETE
+					FROM ' . TABLE_PREFIX . 'ExportUserPresets
+					WHERE (' . implode(') AND (', $where_clause) . ')';
+			$this->Conn->Query($sql);
 		}
 
 		/**