Can't create property RealmList<TranslatedString> by Realm Studio

Here my Realm object

public class LocalizedString extends RealmObject {
    private RealmList<TranslatedString> translations = new RealmList<>();
 
    public RealmList<TranslatedString> getTranslations() {
        return translations;
    }

}

I want to create this schema by Realm Studio So here screenshots:

But I get error:

Why I can’t create properties RealmList<TranslatedString> translations ?

[cmelchior]

Realm Studio has been updated to no longer show invalid combinations for the nullability flag. This should be part of the next release.

[Zhuinden]

In that case, RealmList<TranslatedString> cannot contain null elements.