diff --git a/CHANGELOG.md b/CHANGELOG.md
index 55e82f5b..08b1293c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
 - Prevent business rules from triggering twice on tickets
+- Fixed routing issue caused by incorrect trailing slash
 
 ## [2.9.19] - 2026-27-01
 
diff --git a/inc/history.class.php b/inc/history.class.php
index 8e729c30..5201ff72 100644
--- a/inc/history.class.php
+++ b/inc/history.class.php
@@ -186,7 +186,7 @@ public static function getHistory($tickets_id, $full_history = false)
             if (! $use_filter_assign_group || isset($filter_groups_id[$hline['groups_id']])) {
                 $rand = mt_rand();
                 // Remplacement du lien par un formulaire
-                echo sprintf("<form action='%s/front/climb_group.php' method='GET' id='history-form-%d'>", $plugin_dir, $rand);
+                echo sprintf("<form action='%sfront/climb_group.php' method='GET' id='history-form-%d'>", $plugin_dir, $rand);
                 echo "<input type='hidden' name='tickets_id' value='" . (int) $tickets_id . "'>";
                 echo "<input type='hidden' name='groups_id' value='" . $hline['groups_id'] . "'>";
                 echo "<button type='submit' title='" . __s("Reassign the ticket to group", "escalade") . "' class='btn btn-icon btn-sm btn-ghost-secondary'>