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diff --git a/docs/content/deployment.rst b/docs/content/deployment.rst
index fd6fd59..0013466 100644
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@@ -2,7 +2,7 @@
.. Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
..
-.. Copyright (C) 2021 Bell Canada
+.. Copyright (C) 2021-2022 Bell Canada
.. Modifications Copyright (C) 2021 Nordix Foundation
=======================
@@ -127,3 +127,14 @@ For development purposes, CPS Temporal can be ran on any environment using
Docker. Refer to `README.md <https://github.com/onap/cps-cps-temporal/blob/master/README.md>`_
and `docker-compose.yml <https://github.com/onap/cps-cps-temporal/blob/master/docker-compose.yml>`_
files for more details.
+
+Upgrade
+=======
+
+**Cps data-updated-event schema v2**
+
+Cps data-updated-event schema v2 used in Jakarta is backward compatible with data-updated-event schema v1 used in Istanbul.
+
+It means that consumers using the schema v2 can process events generated by producers using the schema v2 or v1.
+
+This implies that cps temporal (consumer) must be upgraded from Istanbul to Jakarta at the same time or before cps core (producer) is upgraded from Istanbul to Jakarta. \ No newline at end of file