diff --git a/components/ILIAS/Authentication/classes/class.ilAuthSession.php b/components/ILIAS/Authentication/classes/class.ilAuthSession.php
index 03fe7fde7e87..9da2b11d9611 100755
--- a/components/ILIAS/Authentication/classes/class.ilAuthSession.php
+++ b/components/ILIAS/Authentication/classes/class.ilAuthSession.php
@@ -67,6 +67,12 @@ protected function getLogger(): ilLogger
      */
     public function init(): bool
     {
+        if (session_status() === PHP_SESSION_ACTIVE) {
+            $this->getLogger()->error(__METHOD__ . ' called with active session.');
+            $this->getLogger()->logStack(ilLogLevel::ERROR);
+            return false;
+        }
+
         session_start();
 
         $this->setId(session_id());