مشكلة عويصة اثناء التريقية للنسخة 3.8.5

Database error in vBulletin 3.8.5:

Invalid SQL:

            INSERT INTO setting
            (varname, grouptitle, value, defaultvalue, datatype, optioncode, displayorder,
            advanced, volatile, validationcode, blacklist, product)
            VALUES
            (
                'forumhomedepth',
                'forumlist',
                '2',
                '2',
                'integer',
                '',
                10,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'forumdisplaydepth',
                'forumlist',
                '2',
                '2',
                'integer',
                '',
                15,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'subforumdepth',
                'forumlist',
                '20',
                '0',
                'integer',
                '',
                20,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'showforumdescription',
                'forumlist',
                '1',
                '1',
                'boolean',
                'yesno',
                25,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'showprivateforums',
                'forumlist',
                '0',
                '0',
                'free',
                'select:piped\r\n0|no\r\n1|yes_hide_post_counts\r\n2|yes_display_post_counts',
                30,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'showlocks',
                'forumlist',
                '',
                '',
                'boolean',
                'yesno',
                40,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'lastthreadchars',
                'forumlist',
                '30',
                '30',
                'integer',
                '',
                50,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'showmoderatorcolumn',
                'forumlist',
                '',
                '',
                'boolean',
                'yesno',
                70,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    ),
    (
                'showprefixlastpost',
                'forumlist',
                '2',
                '2',
                'number',
                'radio:piped\r\n0|no\r\n1|yes_plain_text_version\r\n2|yes_rich_text_version',
                80,
                0,
                1,
                    '',
                    0,
                    'vbulletin'
    );

MySQL Error   : Duplicate entry 'subforumdepth' for key 1
Error Number  : 1062
Request Date  : Tuesday, May 25th 2010 @ 08:55:21 PM
Error Date    : Tuesday, May 25th 2010 @ 08:55:21 PM
Script        : http://midar.info/forum/install/finalupgrade.php?step=1
Referrer      : http://midar.info/forum/install/finalupgrade.php
IP Address    : 41.248.97.203
Username      : 
Classname     : vB_Database
MySQL Version : 5.0.67-community