problem after upgrading

[Brent Busby]

I'm on GNU Emacs 26.2, and I recently did a melpa package update which
upgraded my BBDB from 20151114.1541 to 20190609.316.

Now whenever I open an email in Gnus, it loads the message but I get the
error: "invalid function: bbdb-pushnew" in the minibuffer.  I haven't
found anything about this online, so I don't know where to begin
troubleshooting it.  All I have in my ~/.emacs about BBDB is:

--8<---------------cut here---------------start------------->8---
(require 'bbdb)
(bbdb-initialize 'gnus 'message)
(bbdb-mua-auto-update-init 'gnus 'message)
(add-hook 'message-setup-hook 'bbdb-mail-aliases)
(setq bbdb-default-area-code 773
      bbdb-pop-up-window-size 5
      bbdb-mua-pop-up-window-size 5
      bbdb-mua-update-interactive-p '(query . create)
      bbdb-message-all-addresses t)
--8<---------------cut here---------------end--------------->8---

This has always worked fine before.  Maybe current BBDB needs a more
bleeding edge Emacs/Gnus than 26.2?