diff --git a/core/userrights.class.inc.php b/core/userrights.class.inc.php
index 2edd33a04..9b9a3cc0c 100644
--- a/core/userrights.class.inc.php
+++ b/core/userrights.class.inc.php
@@ -1838,7 +1838,6 @@ class UserRights
 			self::$m_aAdmins = array();
 			self::$m_aPortalUsers = array();
 		}
-		Session::FlushSession();
 		self::_ResetSessionCache();
 		if (self::$m_oAddOn)
 		{
diff --git a/sources/application/Helper/Session.php b/sources/application/Helper/Session.php
index 547f933c4..0facb2669 100644
--- a/sources/application/Helper/Session.php
+++ b/sources/application/Helper/Session.php
@@ -49,19 +49,6 @@ class Session
 		}
 	}
 
-	public static function FlushSession()
-	{
-		if (self::IsModeCLI()) {
-			return;
-		}
-
-		if (!is_null(self::$iSessionId)) {
-			self::$bIsInitialized = false;
-			self::$bSessionStarted = false;
-			self::Start();
-		}
-	}
-
 	public static function RegenerateId($bDeleteOldSession = false)
 	{
 		if (self::IsModeCLI()) {
@@ -69,6 +56,9 @@ class Session
 		}
 
 		session_regenerate_id($bDeleteOldSession);
+		if (self::$bSessionStarted) {
+			self::WriteClose();
+		}
 		self::$bSessionStarted = session_start();
 		self::$iSessionId = session_id();
 	}
diff --git a/test/application/Session/SessionTest.php b/test/application/Session/SessionTest.php
index ee1ce14ad..fbc598da6 100644
--- a/test/application/Session/SessionTest.php
+++ b/test/application/Session/SessionTest.php
@@ -133,4 +133,12 @@ class SessionTest extends ItopTestCase
 		$this->assertFalse(Session::IsSet(['test1', 'test2', 'test3']));
 	}
 
+	public function testRegenerateId()
+	{
+		Session::Start();
+		$iPrevSessionId = Session::$iSessionId;
+		Session::RegenerateId();
+		//$this->assertFalse(Session::IsSet('test'));
+		$this->assertNotEquals($iPrevSessionId, Session::$iSessionId);
+	}
 }