From c5281935c6ff7d7b208e43794cbef21070acc090 Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@netways.de>
Date: Mon, 15 Feb 2016 11:14:37 +0100
Subject: [PATCH] Regenerate a session ID only if the session exists

refs #11151
---
 library/Icinga/Web/Session/PhpSession.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/library/Icinga/Web/Session/PhpSession.php b/library/Icinga/Web/Session/PhpSession.php
index 06fd08b7c..0c10cdefa 100644
--- a/library/Icinga/Web/Session/PhpSession.php
+++ b/library/Icinga/Web/Session/PhpSession.php
@@ -213,7 +213,9 @@ class PhpSession extends Session
     public function refreshId()
     {
         $this->open();
-        session_regenerate_id();
+        if ($this->exists()) {
+            session_regenerate_id();
+        }
         session_write_close();
         $this->hasBeenTouched = true;
     }