Discuz! info: MySQL Query Error

Time: 2017-4-29 2:42am
Script: /plugin.php

SQL: UPDATE [Table]fam SET level = 10000 , mb = , maxmb = 101580 WHERE cmoney = 500000000
Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' maxmb = 101580 WHERE cmoney = 500000000' at line 1
Errno.: 1064