In 913, Erchanger and King Conrad I of Germany fell out, but Erchanger married off his daughter Cunigunda, whose husband, Luitpold, had just died, to the king.
Pada tahun 913, Erchanger dan Raja Konrad I jatuh, akan tetapi Erchanger menikahkan adiknya Kunigunde dengan raja, yang suaminya, Luitpold, baru meninggal.