3a186d29df88779ee75a519cbcc024fc25a0047b
Demoting the operator on park-buzi failed with "sanitize_string: invalid characters in 'park-operator'" — Ubuntu's perl adduser/deluser tooling rejects the hyphenated username. §5c now prescribes gpasswd -d for sudo/lxd/lpadmin (shadow-suite, no perl sanitize) and documents that group removal lands at NEXT login: the auto-login operator session keeps its old memberships until reboot/relog, so verify `groups` from inside the session afterwards. Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V
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