AttributeError: 'Delaunay' object has no attribute 'vertices'

[yuli-stack]

for the Example: very complex augmentation pipeline
/usr/local/lib/python3.10/dist-packages/skimage/transform/_geometric.py in estimate(self, src, dst)
982 # find affine mapping from source positions to destination
983 self.affines = []
--> 984 for tri in self._tesselation.vertices:
985 affine = AffineTransform(dimensionality=ndim)
986 success &= affine.estimate(src[tri, :], dst[tri, :])

AttributeError: 'Delaunay' object has no attribute 'vertices'