Traceback (most recent call last):

 "/home/aw/env3/lib/python3.4/site-packages/sqlalchemy/ext/declarative/clsregistry.py", line 281, in __call__
x = eval(self.arg, globals(), self._dict)

 "<string>", line 1, in <module>NameError: name 'secondary' is not defined
Traceback (most recent call last):


 "venv/lib/python3.8/site-packages/traitlets/traitlets.py", line 528, in get

value = obj._trait_values[self.name]
KeyError: 'template_paths'
