account deleting fails with a 500

Mar 25 19:14:18 aur.archlinux.org php-fpm[2125283]: pool aur[2125283]: PHP Fatal error:  Uncaught PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'UsersID' in 'where clause' in /srv/http/aurweb/web/lib/acctfuncs.inc.php:976
Mar 25 19:14:18 aur.archlinux.org php-fpm[2125283]: pool aur[2125283]: Stack trace:
Mar 25 19:14:18 aur.archlinux.org php-fpm[2125283]: pool aur[2125283]: #0 /srv/http/aurweb/web/lib/acctfuncs.inc.php(976): PDO->query()
Mar 25 19:14:18 aur.archlinux.org php-fpm[2125283]: pool aur[2125283]: #1 /srv/http/aurweb/web/html/account.php(132): user_delete()
Mar 25 19:14:18 aur.archlinux.org php-fpm[2125283]: pool aur[2125283]: #2 /srv/http/aurweb/web/html/index.php(156): include('/srv/http/aurwe...')
Mar 25 19:14:18 aur.archlinux.org php-fpm[2125283]: pool aur[2125283]: #3 {main}
Mar 25 19:14:18 aur.archlinux.org php-fpm[2125283]: pool aur[2125283]:   thrown in /srv/http/aurweb/web/lib/acctfuncs.inc.php on line 976