Anyone there with the ability to correct this mistake?
@Otto II von Braunschweig-Harburg is NOT a son of @Ernst I, Duke of Brunswick-Lüneburg. His father is @Otto I von Braunschweig-Lüneburg, as can be seen from the sources linked to Otto II's profile (German Wikipedia and The Peerage).
I cannot correct the mistake, but perhaps one of you who also have interest in these families can do it?