If changing printer settings no longer works because the system starts requesting the lpadmin password try this command in Terminal:
dseditgroup -o edit -p -a admin -t group _lpadmin
This adds the admin user back to the lpadmin group and changes should then be possible.
I usually write a blog post about once a week. The latest post can be viewed here: Deranged Rants: Many of them are totally feral, unhinged, and totally irrational. (posted 2024-11-13 at 17:55:14). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2024-08-22 Stirring Up Trouble: Let's just get every view out there and fairly debate them..