state error

[Cheng shi hua]

property var baodu: 100

states: [
State {
name: "awake"
PropertyChanges { target: root }
},
State {
name: "idle"
PropertyChanges { target: root; }
}
]
transitions: [
Transition {
enabled: alive
from: ""; to: "awake"
ParallelAnimation {
SequentialAnimation {
NumberAnimation { target: root; property: "scale"; to: 2; duration: 100 }
NumberAnimation { target: root; property: "scale"; to: 1; duration: 500 }
}
ScriptAction {
script: {
ani0.start()
baodu -= 1
}
}
}
},
Transition {
enabled: alive
from: ""; to: "idle"
ParallelAnimation {
ScriptAction {
script: {
baodu -= 1
ani0.start()
console.log("idle start")
}
}
}
}
]

Component.onCompleted: {
state = "awake"
}

onBaoduChanged: {
    state = "idle"
}

result: <Unknown File>: QML StateGroup: Can't apply a state change as part of a state definition.

I only change the property baodu -= 1