Why is there a TypeError indicating that the keyword argument 'app' was unexpected in SQLAlchemy.create_all()?

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There could be several reasons why a TypeError is indicating that the keyword argument 'app' was unexpected in SQLAlchemy.createall(). One possible reason is that the version of SQLAlchemy being used does not support the 'app' keyword argument. Another possible reason is that the method being called is not the createall() method of the SQLAlchemy package, but rather a similarly named method in a different package or module that does not accept the 'app' keyword argument. It's also possible that a typo or other mistake in the code is causing the error to be raised.