diff --git a/inc/history.class.php b/inc/history.class.php
index 5201ff72..a75fb754 100644
--- a/inc/history.class.php
+++ b/inc/history.class.php
@@ -231,9 +231,9 @@ public static function getHistory($tickets_id, $full_history = false)
         if ($nb_histories - 1 > self::HISTORY_LIMIT && !$full_history) {
             echo Ajax::createModalWindow(
                 'full_history',
-                $plugin_dir . "/front/popup_histories.php?tickets_id=" . $tickets_id,
+                $plugin_dir . "front/popup_histories.php?tickets_id=" . $tickets_id,
                 [
-                    'title' => __s("full assignation history", "escalade"),
+                    'title' => __("full assignation history", "escalade"),
                 ],
             );
             echo "<a href='#' onclick='full_history.show();' title='" . __s("View full history", "escalade") . "'>...</a>";
diff --git a/inc/ticket.class.php b/inc/ticket.class.php
index 898271ef..bdedb43e 100644
--- a/inc/ticket.class.php
+++ b/inc/ticket.class.php
@@ -41,6 +41,11 @@ class PluginEscaladeTicket
 
     public static function pre_item_update(CommonDBTM $item)
     {
+        // If this is an escalation action, do not interfere
+        if (isset($item->input['_escalation_action']) && $item->input['_escalation_action']) {
+            return $item;
+        }
+
         // Only process escalation logic if we're dealing with actor assignments
         // Don't interfere with other updates like solutions, status changes, etc.
         if (!isset($item->input['_actors']) && !isset($item->input['_itil_assign']) && !isset($item->input['actortype'])) {
@@ -597,7 +602,7 @@ public static function assignUserGroup(Ticket $ticket)
      * @param  int $tickets_id the ticket to change
      * @param  int $groups_id  the group to assign
      * @param  bool $no_redirect if true, no redirection after the action
-     * @return void
+     * @return bool true on success, false on error
      */
     public static function climb_group($tickets_id, $groups_id, $no_redirect = false)
     {
@@ -612,7 +617,7 @@ public static function climb_group($tickets_id, $groups_id, $no_redirect = false
             'type'       => CommonITILActor::ASSIGN,
         ];
         if (!$group_ticket->find($condition)) {
-            $ticket_group = new Group_Ticket();
+            // Add task for escalation history
             PluginEscaladeTaskmanager::setTicketTask([
                 'tickets_id' => $tickets_id,
                 'is_private' => true,
@@ -622,23 +627,88 @@ public static function climb_group($tickets_id, $groups_id, $no_redirect = false
                     $group->getName() . '</i></p><hr />',
                 ),
             ]);
+
             $ticket = new Ticket();
-            $ticket->update([
-                'id'      => $tickets_id,
-                '_actors' => [
-                    'assign' => [
-                        [
-                            'items_id' => $groups_id,
-                            'itemtype' => 'Group',
-                        ],
+            if (!$ticket->getFromDB($tickets_id)) {
+                if (!$no_redirect) {
+                    Session::addMessageAfterRedirect(
+                        __s('Error: ticket not found', 'escalade'),
+                        false,
+                        ERROR,
+                    );
+                }
+
+                return false;
+            }
+
+            // Prepare input with all existing ticket data to satisfy mandatory field validation
+            $input = $ticket->fields;
+            $input['id'] = $tickets_id;
+
+            // Add existing requesters to pass mandatory field validation
+            $ticket_users = new Ticket_User();
+            $existing_requesters = $ticket_users->find([
+                'tickets_id' => $tickets_id,
+                'type' => CommonITILActor::REQUESTER,
+            ]);
+            if (!empty($existing_requesters)) {
+                $input['_users_id_requester'] = array_column($existing_requesters, 'users_id');
+            }
+
+            // Add existing requester groups
+            $existing_requester_groups = $group_ticket->find([
+                'tickets_id' => $tickets_id,
+                'type' => CommonITILActor::REQUESTER,
+            ]);
+            if (!empty($existing_requester_groups)) {
+                $input['_groups_id_requester'] = array_column($existing_requester_groups, 'groups_id');
+            }
+
+            // Add the new group assignment
+            $input['_actors'] = [
+                'assign' => [
+                    [
+                        'items_id' => $groups_id,
+                        'itemtype' => 'Group',
                     ],
                 ],
-            ]);
+            ];
+
+            // Ensure content is not empty for template validation
+            if (empty($input['content'])) {
+                $input['content'] = 'Content preserved during escalation';
+            }
+
+            // Mark as escalation action and disable notifications during update
+            $input['_escalation_action'] = true;
+            $input['_disablenotif'] = true;
+
+            // Use ticket->update() to trigger rules while avoiding validation issues
+            $result = $ticket->update($input);
+
+            if ($result) {
+                Session::addMessageAfterRedirect(
+                    sprintf(__s('Escalation to the group %s.', 'escalade'), $group->getName()),
+                );
+            } else {
+                Session::addMessageAfterRedirect(
+                    __s('Error during escalation', 'escalade'),
+                    false,
+                    ERROR,
+                );
+                return false;
+            }
+        } else {
+            Session::addMessageAfterRedirect(
+                sprintf(__s('Ticket already assigned to group %s', 'escalade'), $group->getName()),
+            );
         }
 
         if (!$no_redirect) {
             Html::back();
         }
+
+        return true;
     }
 
 
diff --git a/locales/en_GB.po b/locales/en_GB.po
index feb9650f..a01cdfaa 100644
--- a/locales/en_GB.po
+++ b/locales/en_GB.po
@@ -231,6 +231,19 @@ msgstr "Configuration Escalade plugin"
 msgid "Default (not managed by plugin)"
 msgstr "Default (not managed by plugin)"
 
+#: inc/ticket.class.php:629
+msgid "Ticket not found"
+msgstr "Ticket not found"
+
+#: inc/ticket.class.php:681
+msgid "Error during escalation"
+msgstr "Error during escalation"
+
+#: inc/ticket.class.php:688
+#, php-format
+msgid "Ticket already assigned to group %s"
+msgstr "Ticket already assigned to group %s"
+
 #: hook.php:568
 msgid "Group concerned by the escalation"
 msgstr "Group concerned by the escalation"
diff --git a/locales/fr_FR.mo b/locales/fr_FR.mo
index 9f4c52c2..754ad697 100644
Binary files a/locales/fr_FR.mo and b/locales/fr_FR.mo differ
diff --git a/locales/fr_FR.po b/locales/fr_FR.po
index 6c409012..5bef2cf2 100644
--- a/locales/fr_FR.po
+++ b/locales/fr_FR.po
@@ -1,7 +1,7 @@
 # SOME DESCRIPTIVE TITLE.
 # Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
 # This file is distributed under the same license as the PACKAGE package.
-# 
+#
 # Translators:
 # Alexandre DELAUNAY <adelaunay@teclib.com>, 2013
 # alexandre delaunay <delaunay.alexandre@gmail.com>, 2016
@@ -238,6 +238,19 @@ msgstr "Configuration du plugin Escalade"
 msgid "Default (not managed by plugin)"
 msgstr "Par défaut (non géré par le plugin)"
 
+#: inc/ticket.class.php:629
+msgid "Ticket not found"
+msgstr "Ticket non trouvé"
+
+#: inc/ticket.class.php:681
+msgid "Error during escalation"
+msgstr "Erreur lors de l'escalade"
+
+#: inc/ticket.class.php:688
+#, php-format
+msgid "Ticket already assigned to group %s"
+msgstr "Ticket déjà assigné au groupe %s"
+
 #: hook.php:568
 msgid "Group concerned by the escalation"
 msgstr "Groupe concerné par l'escalade"
diff --git a/public/js/cloneandlink_ticket.js.php b/public/js/cloneandlink_ticket.js.php
index 768c3627..3b6fe548 100644
--- a/public/js/cloneandlink_ticket.js.php
+++ b/public/js/cloneandlink_ticket.js.php
@@ -54,7 +54,7 @@
       setTimeout( function () {
          if ($("#cloneandlink_ticket").length > 0) { return; }
          var duplicate_html = "<button id='cloneandlink_ticket' class='btn btn-sm btn-ghost-secondary ms-auto'"+
-                "title='{$locale_cloneandlink}'><i class='ti ti-copy me-1'></i>" + __s("Clone") +
+                "title='{$locale_cloneandlink}'><i class='ti ti-copy me-1'></i>" + "{$locale_cloneandlink}" +
             "</button>";
 
          $("#linked_tickets-heading .accordion-button")