Error: list index out of range

[knottttt]

Python: Traceback (most recent call last): File "\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\voxel_skinning\voxel_heat_diffuse_skinning.py", line 144, in modal self.read_weight_data(self._objs, os.path.join(os.path.dirname(file), "data", "untitled-weight.txt")) File "\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\voxel_skinning\voxel_heat_diffuse_skinning.py", line 108, in read_weight_data group_name = bones[int(tokens[2])] IndexError: list index out of range

After this error, I tried to move the same model and armature to a new project and repeat the same bind steps, and no error reproted. Don't what differents would make this error come up.