this is my code. why this.settingData[key] type is never?

enum InlineEnum {
    auto,
    manual,
    close
}
interface DataType {
    inlineType: InlineEnum;
    localCodeRepo: boolean;
}
class Cla {
    private settingData: DataType = {
        inlineType: InlineEnum.auto,
        localCodeRepo: false
    }
    setConfig(key: keyof DataType, value: InlineEnum | boolean) {
        this.settingData[key] = value;
    }
}

Type 'boolean | InlineEnum' is not assignable to type 'never'. Type 'boolean' is not assignable to type 'never'.ts(2322) (property) Cla.settingData: DataType

I have tried deleting ‘inlineType’ from settingData and there should be no such issue. It seems to be caused by ‘enum’. Can anyone know why?