PS C:\Users\nmyle\OneDrive\Desktop\flaskcode\flaskblog2> flask db downgrade                         INFO  [alembic.runtime.migration] Context impl SQLiteImpl.
INFO  [alembic.runtime.migration] Will assume non-transactional DDL.
INFO  [alembic.runtime.migration] Running downgrade 5cab23b374b6 -> 96380922847a, adding ConfirmationEmail table
Traceback (most recent call last):
  File "C:\Users\nmyle\anaconda3.1\Scripts\flask-script.py", line 9, in <module>
    sys.exit(main())
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\flask\cli.py", line 967, in main
    cli.main(args=sys.argv[1:], prog_name="python -m flask" if as_module else None)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\flask\cli.py", line 586, in main
    return super(FlaskGroup, self).main(*args, **kwargs)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\click\core.py", line 1053, in main
    rv = self.invoke(ctx)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\click\core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\click\core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\click\core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\click\core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\click\decorators.py", line 26, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\flask\cli.py", line 426, in decorator
    return __ctx.invoke(f, *args, **kwargs)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\click\core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\flask_migrate\cli.py", line 167, in downgrade
    _downgrade(directory, revision, sql, tag, x_arg)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\flask_migrate\__init__.py", line 98, in wrapped
    f(*args, **kwargs)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\flask_migrate\__init__.py", line 195, in downgrade
    command.downgrade(config, revision, sql=sql, tag=tag)
  File "C:\Users\nmyle\anaconda3.1\lib\contextlib.py", line 126, in __exit__
    next(self.gen)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\alembic\operations\base.py", line 374, in batch_alter_table
    impl.flush()
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\alembic\operations\batch.py", line 138, in flush
    fn(*arg, **kw)
  File "C:\Users\nmyle\anaconda3.1\lib\site-packages\alembic\operations\batch.py", line 587, in drop_column
    del self.columns[column.name]
KeyError: 'confirmation_email'