Xiujun Li wrote:
Thanks for your reply, I check my mediawiki version on Server, it is 1.15.1, by July, 14, 2009. Though it is not latest version (1.17 by February, 2010), it is the nearer version.
Anyway, your answer gives me some hints about the deleted pages.
Thanks,
The old versions that didn't keep the pageid for deleted pages are really old. But you may have deleted pages without the pageid stored if it was upgraded. Latest version is 1.15.3 (you should update to avoid a CSRF bug), there's no mediawiki 1.17 yet.