Discuz! Database Error

(1064) You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 's Thesis'' at line 1
SELECT displayname FROM bib_pubtype WHERE typename='Master's Thesis'

PHP Debug

No.FileLineCode
1bib.php44require_once(%s)
2source/module/bib/bib_ref.php128discuz_database::result_first(%s)
3source/class/discuz/discuz_database.php120discuz_database::query(%s, Array, false, false)
4source/class/discuz/discuz_database.php139db_driver_mysql->query(%s, false, false)
5source/class/db/db_driver_mysql.php152db_driver_mysql->halt(%s, %d, %s)
6source/class/db/db_driver_mysql.php223break()
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