Custom scenario wrong era

[Leldy]

I have a scenario meant to start in the renaissance (in the year 2077 AD), because it's a sort of nuclear apocalypse thing where tech reverts. Whenever I start it, everyone is in the information era, and this happens to another custom scenario set in 1900. In the SDK, all civs are set to the correct era, so I don't know the issue. Any help is appreciated!