From macOS Monterey 12.0.1 to Windows 11: error "running an old version"

from macOS Monterey 12.0.1 TeamViewer Version: 15.25.5 (5ceca702ecc)

to

Windows 11 10.0.22000 build 22000 TeamViewer Version 15.25.8

i get an error message on my Mac that the destination machine is running an old version of TeamViewer (it's a brand-new version which I just downloaded and installed today).