A Database Error Occurred

Error Number: 1054

Unknown column 'istop' in 'order clause'

SELECT * FROM `mba_portal_sem_news` WHERE isdel = 0 and state = 1 and ( (find_in_set(462,catid))) ORDER BY `istop` desc, `createtime` desc LIMIT 20

Filename: models/Basemodel.php

Line Number: 98