MySQL Error:

MySQL Query Error: UPDATE [dbpre]subject SET coupons=coupons-1 WHERE sid = '103' Error description: BIGINT UNSIGNED value is out of range in '(`dp`.`[dbpre]subject`.`coupons` - 1)'
Error number: 1690
Date: 2019-02-24 @ 02:33
Script: //www.yb-66.com/dp/couponnew-46.html

Debug backtrace:

FileLineFunction
core/lib/mysql.php173ms_mysql->_halt()
core/lib/activerecord.php237ms_mysql->exec()
core/modules/coupon/model/coupon_class.php510ms_activerecord->update()
core/modules/coupon/model/coupon_class.php382msm_coupon->update_subject_num()
core/modules/coupon/detail_new.php61msm_coupon->check_valid()
core/modules/coupon/common.php29include()
index-v2.php66include()