Unregistering a sip phone, Realtime mysql bug?

when unregistering an X-lite softphone, debugging mode:

Nov 21 12:44:59 DEBUG[4726]: res_config_mysql.c:321 update_mysql: MySQL RealTime: Update SQL: UPDATE sip_buddies SET ipaddr = ‘192.168.’, port = ‘À÷æ·œ÷æ·Ñc’, regseconds = ‘0’, username = ‘willis’, fullcontact = ‘’ WHERE name = ‘willis’

what’s wrong with ‘port=’?