The options auto_now, auto_now_add, and defa ult are mutually exclusive. Only one of these options may be present.
class Users(models.Model):
ctime = models.DateTimeField(auto_now_add=True)
uptime = models.DateTimeField(auto_now=True)
# It will work.
# Explanation:
# These both are mutually exclusive means you should use only one of them, not both.