Resize Image On Save is resizing all images in directory?

Hi I have an upload form that uploads an image and on the save i
resize the image. But when i do this images that are in the same
directory seem to get resized aswell even though they have unique hash
names? any help please.

MODELS.py

def upload_to(instance, old_filename):
import time
import hashlib
import os

extension = os.path.splitext(old_filename)[1]
filename = hashlib.md5(str(time.time())).hexdigest() + extension
return "photos/%s/%s" % (instance.userprofile.user_id, filename)

class UserProfilePic(models.Model):
current = models.BooleanField()
userprofile = models.ForeignKey(UserProfile)
profilepic = models.ImageField(upload_to=upload_to)

def save(self):
from PIL import Image, ImageOps

super(UserProfilePic, self).save()

#create profile image
filename2 = self.profilepic.path
im2 = Image.open(filename2)
im2 = ImageOps.fit(im2, (170, 190), Image.ANTIALIAS,
(0.5,0.5)).save(filename, "JPEG", quality=100)

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