outdated TeX Live upgrade script?

[Stuart Little]

I am trying to upgrade from TL2018 to TL2019 following these[1] instructions verbatim (this has worked for me in the past, repeatedly). While running the upgrade script, however, I receive the following message(s):

Verifying archive integrity... All good.
Uncompressing TeX Live Manager Updater 100%
./runme.sh: updating in <top directory>/texlive/2019...
./runme.sh: tlmgr version says this is TeX Live 2018,
./runme.sh: and this updater script created: Tue Sep 4 02:55:31 CEST 2018.
./runme.sh: have TL 2018, new version also 2018;
./runme.sh: using --upgrade doesn't make sense; terminating.
(./runme.sh: makeself creation date = Tue Sep 4 02:55:31 CEST 2018.)

The problem seems to be that the link on the upgrade page is to an earlier version of the upgrade script. Has anyone else encountered this problem?

---

References:

[1] https://tug.org/texlive/upgrade.html