Scene Transition depreciation error

I have created a scene and an automation to call it over a 2 second transition exactly how the support pages indicate here: however when I run the automation I get an warning in logs saying:

Logger: homeassistant.components.light.reproduce_state
Source: components/light/ 
Integration: Light (documentation, issues) 
First occurred: 20:48:22 (18 occurrences) 
Last logged: 21:44:56

The use of other attributes than device state attributes is deprecated and will be removed in a future release. Invalid attributes are ['transition']. Read the logs for further details:

Is the error wrong or have I misunderstood something? My automation which triggers the warning is below. It works perfectly, but seemingly is calling something wrong.

alias: Netflix Playing
  - platform: state
    entity_id: media_player.fire_stick
    to: playing
  - condition: state
    entity_id: media_player.fire_stick
    state: Netflix
    attribute: source
  - condition: time
    after: '20:30'
  - service: scene.turn_on
      entity_id: scene.movie_time
      transition: 2
mode: single