if a server has some active WireGuard clients, i.e. there are entries in wg_peers, but WireGuard is disabled there is an error shown when running daemon-sync.
wg_peers
daemon-sync
Related: https://todo.sr.ht/~eduvpn/server/137
# /usr/libexec/vpn-user-portal/daemon-sync ERROR: key "wRangeFour" not available