@startuml

title Change alert strategy

(*) --> "Select alert and new strategy"
	--> if "Alert or strategy doesn't exist"
		--> [True] "Display error"
	else
		--> [False] if "New strategy is the same as the current one for this alert"
			--> [True] "Display error"
			--> (*)
		else
			--> [False] "Build new alert"
			--> "Start scheduling"
			--> (*)

@enduml