diff --git a/doc/source/image_src/plantuml/action_plan_state_machine.txt b/doc/source/image_src/plantuml/action_plan_state_machine.txt
index 0eab6d0f1..0b05d78ce 100644
--- a/doc/source/image_src/plantuml/action_plan_state_machine.txt
+++ b/doc/source/image_src/plantuml/action_plan_state_machine.txt
@@ -7,7 +7,9 @@ ONGOING --> FAILED: Something failed while executing\nthe Action Plan in the Wat
 ONGOING --> SUCCEEDED: The Watcher Applier executed\nthe Action Plan successfully
 FAILED --> DELETED : Administrator removes\nAction Plan
 SUCCEEDED --> DELETED : Administrator removes\nAction Plan
-ONGOING --> CANCELLED : Administrator cancels\nAction Plan
+ONGOING --> CANCELLING : Administrator cancels\nAction Plan
+CANCELLING --> CANCELLED : The Watcher Applier cancelled\nthe Action Plan successfully
+CANCELLING --> FAILED : Something failed while cancelling\nthe Action Plan in the Watcher Applier
 RECOMMENDED --> CANCELLED : Administrator cancels\nAction Plan
 RECOMMENDED --> SUPERSEDED : The Watcher Decision Engine supersedes\nAction Plan
 PENDING --> CANCELLED : Administrator cancels\nAction Plan
diff --git a/doc/source/images/action_plan_state_machine.png b/doc/source/images/action_plan_state_machine.png
index 41018530a..4359aedc7 100644
Binary files a/doc/source/images/action_plan_state_machine.png and b/doc/source/images/action_plan_state_machine.png differ