Although I have updated both lr and ps and camera raw (I am subscribed to the cc photography plan) this message pops up when I open a photo in ps through lr
This is a known bug, which will be fixed in a future update, so you can safely ignore this message.
Click Open anyway, and check the option Don't show again if available.
See also Camera Raw 9.10
Moving to Lightroom Classic CC
Retrieving data ...