Existing settings erased after plugin update

Hi there,

I've deployed an update of my existing plugin, which contains an addition of a new setting available for my users. This is simply a new option than can be enabled or not.   

After applying the update in Intellij, I realized that the current configuration of the plugin has been reset. 

Is it a standard behavior in Intellij ? Is there a way to avoid that and keep user's current settings ?

I use this kind of class :

---- 

@State(
        name = "com.mycompany.appli.settings.AppSettingsState",
        storages = {@Storage("MyCompanySettingsPlugin.xml")}
)
public class AppSettingsState implements PersistentStateComponent<AppSettingsState> {
    ...
    public static AppSettingsState getInstance() {
        return ServiceManager.getService(AppSettingsState.class);
    }

    @Override
    public @Nullable AppSettingsState getState() {
        return this;
    }

    @Override
    public void loadState(@NotNull AppSettingsState state) {
        XmlSerializerUtil.copyBean(state, this);
    }
}

----

Thanks to you, all the best.