Parse error

Could someone tell me what the syntax error on the Proxy-To-Realm line is please? preacct { detail suffix if ((Proxy-To-Realm = DEFAULT) && (User-Name =~ /.*@.*.domain.tld$/)) update control { Proxy-To-Realm := NULL } } /usr/local/freeradius/sbin/radiusd -X: /usr/local/freeradius/etc/raddb/sites-enabled/eduroam[23]: Parse error in condition at: (Proxy-To-Realm = DEFAULT) && (User-Name =~ /.*@.*.domain.tld$/)) Errors reading /usr/local/freeradius/etc/raddb/radiusd.conf