여분필드 추가를 phpmyadmin으로 했습니다.

write_update.skin.php 코드는

<?
if (!defined("_GNUBOARD_")) exit; // 개별 페이지 접근 불가

$sql = " select wr_11 from $write_table ";
$result = @mysql_query($sql);
if (!$result) {
$sql = " ALTER TABLE $write_table
ADD wr_11 VARCHAR( 255 ) NOT NULL,
ADD wr_12 VARCHAR( 255 ) NOT NULL,
ADD wr_13 VARCHAR( 255 ) NOT NULL,
ADD wr_14 VARCHAR( 255 ) NOT NULL,
ADD wr_15 VARCHAR( 255 ) NOT NULL,
ADD wr_16 VARCHAR( 255 ) NOT NULL,
ADD wr_17 VARCHAR( 255 ) NOT NULL,
ADD wr_18 VARCHAR( 255 ) NOT NULL,
ADD wr_19 VARCHAR( 255 ) NOT NULL,
ADD wr_20 VARCHAR( 255 ) NOT NULL,
ADD mb_zip1 VARCHAR( 255 ) NOT NULL,
ADD mb_zip2 VARCHAR( 255 ) NOT NULL,
ADD mb_addr1 VARCHAR( 255 ) NOT NULL,
ADD mb_addr2 VARCHAR( 255 ) NOT NULL

";
@mysql_query($sql);
}

$sql_plus = "
wr_11 = '$wr_11',
wr_12 = '$wr_12',
wr_13 = '$wr_13',
wr_14 = '$wr_14',
wr_15 = '$wr_15',
wr_16 = '$wr_16',
wr_17 = '$wr_17',
wr_18 = '$wr_18',
wr_19 = '$wr_19',
wr_20 = '$wr_20',
mb_zip1 = '$mb_zip1',
mb_zip2 = '$mb_zip2',
mb_addr1 = '$mb_addr1',
mb_addr2 = '$mb_addr2'
";

$sql = " update $write_table set $sql_plus where wr_id = '$wr_id' ";sql_query($sql);

goto_url("./board.php?bo_table=$bo_table&page=$page" . $qstr);
?>


위와 같습니다.
당최 이유를 모르겠네요...