Help ?? Db error

[canimforumum]

first of all after we load it eveything seems normally.. But when we want to open a new topic ,

unknown link: subject
>if you r sure it's normal and known link , pls tell it to your administrator

there is a warning like this.. When we return the home page the subject that we want to open seems on the home page.. but when we want to see details of new subject we see the same warning above.. and this subject is seeming as last post at all subjects..

and when i want to create a second subject i see the warning below

Database error in vBulletin 3.6.6:
>>Invalid SQL:
>INSERT INTO thread
>(postusername, postuserid, title, iconid, visible, forumid, similar, >dateline, open, attach, lastpost, lastposter, replycount, hiddencount, >deletedcount)>VALUES>('', 2, 'ddddddddddddddddd', 0, 1, 115, '', 1190009385, 1, 0, 1190009385, >'', 0, 0, 0);

>>MySQL Error : Duplicate entry '0' for key 1>Error Number : 1062
>Date : Monday, September 17th 2007 @ 09:09:46 AM
>Script : http://www.sideadi.com/newthread.php...stthread&f=115
>Referrer : http://www.sideadi.com/newthread.php?do=newthread&f=115
>IP Address :.........
>Username :
>Classname : vb_database

we see these warnings when we push "open new subject" button..

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