[1.1.0] Crash after autosaving world from 1.0.0 (DifficultySettings::save)

[PyroGamer666]

After loading my game in 1.1.0, the game worked until it attempted to autosave, which caused the game to crash. Saving the world manually does not result in a crash. The world used and the log file are attached.

Error MapSettings.cpp:551: Saving in this state will result in a desync when this is loaded: 1 != 10.

[boskid]

Duplicate 91673