traceback

Traceback (most recent call last):
  File "c:\users\riane\documents\mygame\evennia\evennia\commands\cmdhandler.py", line 631, in _run_command
    ret = cmd.func()
  File "C:\Users\riane\Documents\mygame\mygameUnbound\typeclasses\npcshop.py", line 128, in func
    shop = create_object(NPCShop,
  File "c:\users\riane\documents\mygame\evennia\evennia\utils\create.py", line 171, in create_object
    new_object.save()
  File "c:\users\riane\documents\mygame\evennia\evennia\utils\idmapper\models.py", line 442, in save
    super().save(*args, **kwargs)
  File "C:\Users\riane\Documents\mygame\evenv\Lib\site-packages\django\db\models\base.py", line 740, in save
    self.save_base(using=using, force_insert=force_insert,
  File "C:\Users\riane\Documents\mygame\evenv\Lib\site-packages\django\db\models\base.py", line 788, in save_base
    post_save.send(
  File "C:\Users\riane\Documents\mygame\evenv\Lib\site-packages\django\dispatch\dispatcher.py", line 173, in send
    return [
  File "C:\Users\riane\Documents\mygame\evenv\Lib\site-packages\django\dispatch\dispatcher.py", line 174, in <listcomp>
    (receiver, receiver(signal=self, sender=sender, **named))
  File "c:\users\riane\documents\mygame\evennia\evennia\typeclasses\models.py", line 68, in call_at_first_save
    instance.at_first_save()
  File "c:\users\riane\documents\mygame\evennia\evennia\objects\objects.py", line 1129, in at_first_save
    self.at_object_creation()
  File "C:\Users\riane\Documents\mygame\mygameUnbound\typeclasses\npcshop.py", line 98, in at_object_creation
    self.cmdset.add_default(ShopCmdSet)
NameError: name 'ShopCmdSet' is not defined

An untrapped error occurred.
(Traceback was logged 20-04-01 16:05:49-06).