Discuz! Database Error

(1242) Subquery returns more than 1 row
select aid,click8,title from portal_article_title where catid = (select catid from portal_category where catname ='“网络书香”基层公共数字文化服务业务培训班')

PHP Debug

No.FileLineCode
1portal.php32require_once(%s)
2source/module/portal/portal_view.php279include_once(%s)
3data/template/3_diy_portal_view_px.tpl.php5category_get_course(Array)
4source/module/portal/portal_view.php283discuz_database::fetch_all(%s)
5source/class/discuz/discuz_database.php100discuz_database::query(%s, Array, false, false)
6source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
7source/class/db/db_driver_mysql.php151db_driver_mysql->halt(%s, %d, %s)
8source/class/db/db_driver_mysql.php218break()
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