Hello NISHANTBIMAL,
It seems that the overlap between the images is not sufficient for stable alignment results. There are only 18 different images (while at least 25-35 images per circle around the object are recommended) in the set. Also the EXIF information is missing. It seems that the zoom lens has been used, which means that it might be better to split the calibration groups prior to the image alignment, otherwise they will be stacked to the same calibration group and the autocalibration results would be incorrect.