用的是4.54全球版。在写完数据库后点下一步就出了这错误提示，这说的是什么意思啊
？

SQL=Table 'mos_banner' already exists:
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# $Id: mambo.sql,v 1.7 2005/11/27 05:18:00 cauld Exp $

# Table structure for table `mos_banner`

CREATE TABLE `mos_banner` (
  `bid` int(11) NOT NULL auto_increment,
  `cid` int(11) NOT NULL default '0',
  `type` varchar(10) NOT NULL default 'banner',
  `name` varchar(50) NOT NULL default '',
  `imptotal` int(11) NOT NULL default '0',
  `impmade` int(11) NOT NULL default '0',
  `clicks` int(11) NOT NULL default '0',
  `imageurl` varchar(100) NOT NULL default '',
  `clickurl` varchar(200) NOT NULL default '',
  `date` datetime default NULL,
  `showBanner` tinyint(1) NOT NULL default '0',
  `checked_out` tinyint(1) NOT NULL default '0',
  `checked_out_time` datetime NOT NULL default '0000-00-00 00:00:00',
  `editor` varchar(50) default NULL,
  `custombannercode` text,
  PRIMARY KEY  (`bid`),
  KEY `viewbanner` (`showBanner`)
) TYPE=MyISAM AUTO_INCREMENT=1
= = = = = = = = = =

SQL=Table 'mos_bannerclient' already exists:
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# Table structure for table `mos_bannerclient`

CREATE TABLE `mos_bannerclient` (
  `cid` int(11) NOT NULL auto_increment,
  `name` varchar(60) NOT NULL default '',
  `contact` varchar(60) NOT NULL default '',
  `email` varchar(60) NOT NULL default '',
  `extrainfo` text NOT NULL,
  `checked_out` tinyint(1) NOT NULL default '0',
  `checked_out_time` time default NULL,
  `editor` varchar(50) default NULL,
  PRIMARY KEY  (`cid`)
) TYPE=MyISAM
= = = = = = = = = =

SQL=Table 'mos_bannerfinish' already exists:
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# Table structure for table `mos_bannerfinish`

CREATE TABLE `mos_bannerfinish` (
  `bid` int(11) NOT NULL auto_increment,
  `cid` int(11) NOT NULL default '0',
  `type` varchar(10) NOT NULL default '',
  `name` varchar(50) NOT NULL default '',
  `impressions` int(11) NOT NULL default '0',
  `clicks` int(11) NOT NULL default '0',
  `imageurl` varchar(50) NOT NULL default '',
  `datestart` datetime default NULL,
  `dateend` datetime default NULL,
  PRIMARY KEY  (`bid`)
) TYPE=MyISAM
= = = = = = = = = =

SQL=Table 'mos_categories' already exists:
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# Table structure for table `mos_categories`

CREATE TABLE `mos_categories` (
  `id` int(11) NOT NULL auto_increment,
  `parent_id` int(11) NOT NULL default 0,
  `title` varchar(50) NOT NULL default '',
  `name` varchar(255) NOT NULL default '',
  `image` varchar(100) NOT NULL default '',
  `section` varchar(50) NOT NULL default '',
  `image_position` varchar(10) NOT NULL default '',
  `description` text NOT NULL,
  `published` tinyint(1) NOT NULL default '0',
  `checked_out` int(11) unsigned NOT NULL default '0',
  `checked_out_time` datetime NOT NULL default '0000-00-00 00:00:00',
  `editor` varchar(50) default NULL,
  `ordering` int(11) NOT NULL default '0',
  `access` tinyint(3) unsigned NOT NULL default '0',
  `count` int(11) NOT NULL default '0',
  `params` text NOT NULL,
  PRIMARY KEY  (`id`),
  KEY `cat_idx` (`section`,`published`,`access`),
  KEY `idx_section` (`section`),
  KEY `idx_access` (`access`),
  KEY `idx_checkout` (`checked_out`)
) TYPE=MyISAM
= = = = = = = = = =

SQL=Table 'mos_components' already exists:
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# Table structure for table `mos_components`

CREATE TABLE `mos_components` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(50) NOT NULL default '',
  `link` varchar(255) NOT NULL default '',
  `menuid` int(11) unsigned NOT NULL default '0',
  `parent` int(11) unsigned NOT NULL default '0',
  `admin_menu_link` varchar(255) NOT NULL default '',
  `admin_menu_alt` varchar(255) NOT NULL default '',
  `option` varchar(50) NOT NULL default '',
  `ordering` int(11) NOT NULL default '0',
  `admin_menu_img` varchar(255) NOT NULL default '',
  `iscore` tinyint(4) NOT NULL default '0',
  `params` text NOT NULL,
  PRIMARY KEY  (`id`)
) TYPE=MyISAM
= = = = = = = = = =

SQL=Duplicate entry '1' for key 1:
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# Dumping data for table `mos_components`

INSERT INTO `mos_components` VALUES (1, 'Banners', '', 0, 0, '', 'Banner Management', 'com_banners', 0, 'js/ThemeOffice/component.png', 0, '')
= = = = = = = = = =

SQL=Duplicate entry '2' for key 1:
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INSERT INTO `mos_components` VALUES (2, 'Manage Banners', '', 0, 1, 'option=com_banners', 'Active Banners', 'com_banners', 1, 'js/ThemeOffice/edit.png', 0, '')
= = = = = = = = = =

SQL=Duplicate entry '3' for key 1:
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INSERT INTO `mos_components` VALUES (3, 'Manage Clients', '', 0, 1, 'option=com_banners&task=listclients', 'Manage Clients', 'com_banners', 2, 'js/ThemeOffice/categories.png', 0, '')
= = = = = = = = = =

SQL=Duplicate entry '4' for key 1:
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INSERT INTO `mos_components` VALUES (4, 'Web Links', 'option=com_weblinks', 0, 0, '', 'Manage Weblinks', 'com_weblinks', 0, 'js/ThemeOffice/globe2.png', 0, '')
= = = = = = = = = =

SQL=Duplicate entry '5' for key 1:
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INSERT INTO `mos_components` VALUES (5, 'Weblink Items', '', 0, 4, 'option=com_weblinks', 'View existing weblinks', 'com_weblinks', 1, 'js/ThemeOffice/edit.png', 0, '')
= = = = = = = = = =

SQL=Duplicate entry '6' for key 1:
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INSERT INTO `mos_components` VALUES (6, 'Weblink Categories', '', 0, 4, 'option=categories§ion=com_weblinks', 'Manage weblink categories', '', 2, 'js/ThemeOffice/categories.png', 0, '')
= = = = = = = = = =

SQL=Duplicate entry '7' for key 1:
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INSERT INTO `mos_components` VALUES (7, 'Contacts', 'option=com_contact', 0, 0, '', 'Edit contact details', 'com_contact', 0, 'js/ThemeOffice/user.png', 1, '')
= = = = = = = = = =

SQL=Duplicate entry '8' for key 1:
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INSERT INTO `mos_components` VALUES (8, 'Manage Contacts', '', 0, 7, 'option=com_contact', 'Edit contact details', 'com_contact', 0, 'js/ThemeOffice/edit.png', 1, '')
= = = = = = = = = =

SQL=Duplicate entry '9' for key 1:
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INSERT INTO `mos_components` VALUES (9, 'Contact Categories', '', 0, 7, 'option=categories§ion=com_contact_details', 'Manage contact categories', '', 2, 'js/ThemeOffice/categories.png', 1, '')
= = = = = = = = = =

你已经装过一次，数据库中已经存在表，因此要先删除表，或者选上删除已有表的选项

在安装时，另取一个数据库名字就行了