XML-RPC Error (84677281): Error writing to database | DEBUG INFO: Column 'maildisplay' cannot be null INSERT INTO mdl_user (city,auth,username,lang,confirmed,lastip,timecreated,timemodified,mnethostid,calendartype,maildisplay,mailformat,maildigest,autosubscribe,trackforums) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?) [array ( 0 => '', 1 => 'joomdle', 2 => '', 3 => 'en', 4 => 1, 5 => '192.168.4.95', 6 => 1425900009, 7 => 1425900009, 8 => '1', 9 => 'gregorian', 10 => NULL, 11 => NULL, 12 => NULL, 13 => NULL, 14 => NULL, )] | ERRORCODE: dmlwriteexception