Avoid hard crash if `Save()` is called before preparing for mutation
Avoid hard crash if `Save()` is called before preparing for mutation

ppy/osu,peppy/osu,ppy/osu,ppy/osu,smoogipoo/osu,NeoAdonis/osu,UselessToucan/osu,NeoAdonis/osu,peppy/osu,UselessToucan/osu,smoogipoo/osu,NeoAdonis/osu,peppy/osu,smoogipooo/osu,smoogipoo/osu,UselessToucan/osu,peppy/osu-new