SQL error....after import from another host.

[adabros]

hi.
If I want open a new thread, After submit I see this:

Database error in vBulletin 4.0.3:

Invalid SQL:

				INSERT INTO postlog
				(postid, useragent, ip, dateline)
				VALUES
				(885038, 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:10.0.2) Gecko/20100101 Firefox/10.0.2', 1579489545, 1330712271);

MySQL Error   : Duplicate entry '885038' for key 'PRIMARY'
Error Number  : 1062
......
Classname     : vB_Database
MySQL Version : 5.1.56

What is this??

But when reloading the page, the new thread is there!!
I'm using vB 4.0.3 liv 1.