Discuz! Database Error

(1054) Unknown column 'NAN' in 'field list'
UPDATE stock_stocks SET sid='16',sname='Hwasin',basic='10',sales=-3277,m_factor='1.17608206787',price=NAN,price_yesterday='13.0857298596',price_change=NAN,tradable='0',team='STX SouL' WHERE sid=16

PHP Debug

No.FileLineCode
1/data/wwwroot/default/gp/ladder.php2require(%s)
2/data/wwwroot/default/gp/head.inc.php2require_once(%s)
3/data/wwwroot/default/gp/common.inc.php12stock_daily3()
4/data/wwwroot/default/gp/functions.inc.php548handle_asm()
5/data/wwwroot/default/gp/functions.inc.php371update_data(%s, Array, %s)
6/data/wwwroot/default/gp/functions.inc.php126discuz_database::query(%s)
7source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
8source/class/db/db_driver_mysql.php151db_driver_mysql->halt(%s, %d, %s)
9source/class/db/db_driver_mysql.php218break()
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