Warning: Undefined variable $write_table in /snacom37/www/theme/BS4-Basic/head.sub.php on line 83

Fatal error: Uncaught mysqli_sql_exception: 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 'where wr_id = '114'' at line 1 in /snacom37/www/lib/common.lib.php:1695
Stack trace:
#0 /snacom37/www/lib/common.lib.php(1695): mysqli_query(Object(mysqli), 'select wr_subje...')
#1 /snacom37/www/lib/common.lib.php(1755): sql_query('select wr_subje...', false, Object(mysqli))
#2 /snacom37/www/theme/BS4-Basic/head.sub.php(86): sql_fetch('select wr_subje...')
#3 /snacom37/www/head.sub.php(7): require_once('/snacom37/www/t...')
#4 /snacom37/www/bbs/alert.php(12): include_once('/snacom37/www/h...')
#5 /snacom37/www/lib/common.lib.php(179): include_once('/snacom37/www/b...')
#6 /snacom37/www/bbs/board.php(76): alert('\xEA\xB8\x80\xEC\x9D\x84 \xEC\x9D\xBD\xEC\x9D\x84 \xEA...', 'http://xn--z69a...')
#7 {main}
  thrown in /snacom37/www/lib/common.lib.php on line 1695