diff --git a/components/ILIAS/Session/classes/Setup/UpdateStepsV12.php b/components/ILIAS/Session/classes/Setup/UpdateStepsV12.php
new file mode 100644
index 000000000000..2b769b8f6798
--- /dev/null
+++ b/components/ILIAS/Session/classes/Setup/UpdateStepsV12.php
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * This file is part of ILIAS, a powerful learning management system
+ * published by ILIAS open source e-Learning e.V.
+ *
+ * ILIAS is licensed with the GPL-3.0,
+ * see https://www.gnu.org/licenses/gpl-3.0.en.html
+ * You should have received a copy of said license along with the
+ * source code, too.
+ *
+ * If this is not the case or you just want to try ILIAS, you'll find
+ * us at:
+ * https://www.ilias.de
+ * https://github.com/ILIAS-eLearning
+ *
+ *********************************************************************/
+
+declare(strict_types=1);
+
+namespace ILIAS\Session\Setup;
+
+use ilDatabaseUpdateSteps;
+use ilDBInterface;
+use ilDBConstants;
+
+class UpdateStepsV12 implements ilDatabaseUpdateSteps
+{
+    private ilDBInterface $db;
+
+    public function prepare(ilDBInterface $db): void
+    {
+        $this->db = $db;
+    }
+
+    public function step_1(): void
+    {
+        $this->db->modifyTableColumn('event', 'details', [
+            'type' => ilDBConstants::T_CLOB,
+            'length' => 4000,
+        ]);
+    }
+}
diff --git a/components/ILIAS/Session/classes/Setup/class.ilSessionSetupAgent.php b/components/ILIAS/Session/classes/Setup/class.ilSessionSetupAgent.php
index 345045009756..1f029f984f67 100755
--- a/components/ILIAS/Session/classes/Setup/class.ilSessionSetupAgent.php
+++ b/components/ILIAS/Session/classes/Setup/class.ilSessionSetupAgent.php
@@ -20,6 +20,7 @@
 
 use ILIAS\Setup;
 use ILIAS\Setup\Config;
+use ILIAS\Session\Setup\UpdateStepsV12;
 
 /**
  * @author  Tim Schmitz <schmitz@leifos.de>
@@ -28,7 +29,12 @@ class ilSessionSetupAgent extends Setup\Agent\NullAgent
 {
     public function getUpdateObjective(?Setup\Config $config = null): Setup\Objective
     {
-        return new ilDatabaseUpdateStepsExecutedObjective(new ilSessionDBUpdateSteps9());
+        return new Setup\ObjectiveCollection(
+            'Update Session component',
+            false,
+            new ilDatabaseUpdateStepsExecutedObjective(new ilSessionDBUpdateSteps9()),
+            new ilDatabaseUpdateStepsExecutedObjective(new UpdateStepsV12())
+        );
     }
 
     public function getStatusObjective(Setup\Metrics\Storage $storage): Setup\Objective