meshconverter: generated prefabs are not overwritten (2019.x)

[unitycoder]

prefab gets multiple meshes appended in unity 2019.x (2017.x works fine)

[unitycoder]

fixed in next update, or you can fix with:
// open PointCloud2MeshConverter.cs

// find line
var rootPrefab = PrefabUtility.SaveAsPrefabAsset(folder.transform.GetChild(i).gameObject, save);

// add this line before that line
AssetDatabase.DeleteAsset(save);