diff --git a/CHANGELOG.md b/CHANGELOG.md
index e77b78ef..37b04d80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,20 +5,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [1.22.0] - 2025-09-30
 
-### Added
-
-- GLPI 11 compatibility
+## [UNRELEASED]
 
 ### Fixed
 
-- Fix  `massive action` for adding value to `multiple` dropdown fields
-- Fix for the `COALESCE` part of the `SQL query` for `multiple` dropdowns
-- Fix `search option` for `multiple` dropdown
-- Fix display from Planning view
 - Fix `classname` resolution when multiple `s` at end of container name
 
+## [1.22.0] - 2025-09-30
+
+### Added
+
+- GLPI 11 compatibility
+
 ## [1.21.23] - 2025-08-26
 
 ### Fixed
diff --git a/inc/container.class.php b/inc/container.class.php
index 2a98cc66..9b65465b 100644
--- a/inc/container.class.php
+++ b/inc/container.class.php
@@ -838,8 +838,7 @@ public static function preItemPurge($item)
         foreach ($founded_containers as $container) {
             $itemtypes = json_decode($container['itemtypes']);
             if (in_array($itemtype, $itemtypes)) {
-                $classname = 'PluginFields' . $itemtype . getSingular($container['name']);
-                $classname = preg_replace('/s{2}$/i', 's', $classname); // in case name ends with 'ss' remove last 's'
+                $classname = self::getClassname($itemtype, $container['name']);
                 $fields    = new $classname();
                 $fields->deleteByCriteria(['items_id' => $item->fields['id']], true);
             }