[Tharos]

I tried to upgrade but this error appeared to me

Step 1) Create New vBulletin 3 Tables

* Creating calendar table
Database error
The =(_ WACH@S _)= database has encountered a problem.




-----------------------------

Database error in vBulletin 3.6.0 Beta 2:

Invalid SQL:

CREATE TABLE calendar (
calendarid int unsigned NOT NULL auto_increment,
title varchar(255) NOT NULL DEFAULT '',
description varchar(100) NOT NULL DEFAULT '',
displayorder smallint NOT NULL DEFAULT '0',
neweventemail varchar(255) NOT NULL DEFAULT '',
moderatenew smallint NOT NULL DEFAULT '0',
startofweek smallint NOT NULL DEFAULT '0',
options int unsigned NOT NULL DEFAULT '0',
cutoff smallint unsigned NOT NULL DEFAULT '0',
eventcount smallint unsigned NOT NULL DEFAULT '0',
birthdaycount smallint unsigned NOT NULL DEFAULT '0',
startyear smallint unsigned NOT NULL DEFAULT '2000',
endyear smallint unsigned NOT NULL DEFAULT '2006',
PRIMARY KEY (calendarid),
KEY displayorder (displayorder)
);

MySQL Error : Table 'calendar' already exists
Error Number : 1050
Date : Sunday, April 6th 2008 @ 11:24:07 AM
Script : http://www.wachos.cl/comunidad/insta...0b3.php?step=1
Referrer : http://www.wachos.cl/comunidad/insta...b3.php?rand=82
IP Address : 200.104.88.220
Username :
Classname : vB_Database











I do not know what to do...
i do not want to lose my users and my 4 months of efforts