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+---
+features:
+  - |
+    Lease status is introduced in this release.
+    With this change, transition graphs of statuses of leases, reservations,
+    and events are redefined while keeping backward compatibility.
+    If you update Blazar from an older version, the lease status is
+    automatically updated from *None* at the time of an event or an API call.
+    See `state machine documentation`_ for more details.
+
+    .. _state machine documentation: https://docs.openstack.org/blazar/latest/user/state-machine.html
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