Erratum: On \(C_2. L\)-geometries (Q1290882)

As C. Huybrechts noticed [private communication], Lemma 1 and Corollary 2 of our paper [\textit{B. Baumeister} and \textit{B. Pasini}, Geom. Dedicata 71, No. 1, 33-59 (1998; Zbl 0911.51015), here cited by [1] are false. C. Huybrechts also gave a counterexample to those statements, which we shall not describe here. Consequently, Theorem 7 of [1] is false as stated. However, a weakened version is true. Some more corrections are necessary.