From 752f7d0d62cb17ef0ba3293108ebbc67de660a49 Mon Sep 17 00:00:00 2001
From: Tim van Dijen <tvdijen@gmail.com>
Date: Sat, 11 Jun 2022 18:59:38 +0200
Subject: [PATCH] Add note on bc-breaking sessions

---
 docs/simplesamlphp-upgrade-notes-2.0.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/simplesamlphp-upgrade-notes-2.0.md b/docs/simplesamlphp-upgrade-notes-2.0.md
index 1e9be1b1d..80d554f61 100644
--- a/docs/simplesamlphp-upgrade-notes-2.0.md
+++ b/docs/simplesamlphp-upgrade-notes-2.0.md
@@ -30,6 +30,8 @@ Functional changes
   It is possible to switch back via the `sharedkey_algorithm`.
   Note however that CBC is vulnerable to the Padding oracle attack.
 - All support for the Shibboleth 1.3 / SAML 1.1 protocol has been removed.
+- Sessions are no longer backwards compatible with previous versions. Make sure to clear your session cache during
+  the upgrade process. How to do this depends on your session backend.
 
 Configuration changes
 ---------------------
-- 
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