Discuz! Database Error

(1064) 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 'system>0' at line 1
SELECT COUNT(*) FROM common_usergroup WHERE type='special' and system>0

PHP Debug

No.FileLineCode
1forum.php65runhooks()
2source/function/function_core.php1109hookscript(%s, %s, %s, Array, %s)
3source/function/function_core.php1158plugin_iwenwen->common(Array)
4source/plugin/iwenwen/iwenwen.class.php30IwenwenApi->updateCategory()
5source/plugin/iwenwen/class/api.class.php131updatecache(Array)
6source/function/function_cache.php47call_user_func(%s)
7build_cache_setting()
8source/function/cache/cache_setting.php97discuz_container->buyusergroup_exists()
9source/function/cache/cache_setting.php97discuz_container->__call(%s, Array)
10source/class/discuz/discuz_container.php58table_common_usergroup->buyusergroup_exists()
11source/class/table/table_common_usergroup.php135discuz_database::result_first(%s, Array)
12source/class/discuz/discuz_database.php117discuz_database::query(%s, Array, false, false)
13source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
14source/class/db/db_driver_mysql.php151db_driver_mysql->halt(%s, %d, %s)
15source/class/db/db_driver_mysql.php218break()
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