Yes, you can update. You just need to make note of any commits to your installed packages manually.
The out-of-date fix included changes to bsd.port.mk(5), and required a new feature in pkg_create(1).
Discussion:
https://www.mail-archive.com/ports@o.../msg73091.html
Commit:
https://www.mail-archive.com/ports-c.../msg85289.html