Can't turn off Peaceful Mode in Beta 13.9?

[TechTon]

Greetings,

I've had a Beta 13.9 Factorio world for a while now and I want to disable peaceful mode so monsters can start attacking me. However, I can't. Whenever I type in "/c game.peaceful_mode = false", it says that peaceful_mode isn't a LUAgameScript key. Is the command still in the game and it just changed names, was it removed, or is it a bug?
Help is appreciated.
~Thanks

[Nexela]

Change Peaceful Mode. Set to true or false. This will only effect new spawns, any existing enemies will stay in their previous state. Usually you would kill all enemies on the map after changing this value.
single player version:

/c game.player.surface.peaceful_mode=false
/c game.forces["enemy"].kill_all_units()


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