Can't restore my database. "You did not select any valid thread" !

[BlackHatSystem]

Hi mates,

I am new to Vbulletin and just purchased my licence. As I got a few problems with the "add profile fields" funcion which used to make my forum crash (I finally understood that my PHP version was too old to support VB 3.6), I thought it would be really useful to be able to export and then restore my database in case a similar issue would occur again !

I could export and import it successfully using several ways: export from admin cp AND from phpmyadmin, import by importing the full database, all the tables to an existing empty database, or by copying a database directly in phpmyadmin. I even made a backup and restored it "successfully" using mysqldumper php script.

All of these methods worked, and I am quite proud of it. Now I know how to export and restore my database following a few different ways...

Well not really proud actually. I still have a major issue when restoring my DB. After I restore it and configure my config.php file properly, everything is back to normal: forum, style, posts, users, statistics... EVERYTHING.

Except when I try to work again on the forum, I get error messages like "No Thread specified. If you followed a valid link, please notify the administrator" (I get this if I try to add a new post). However, the message is posted though. If I try to remove it from my admin account (user end, not from admin cp), I get this:
"You did not select any valid threads".

I really don't know what to do. I tried loads of things to fix this, but nothing worked...

Thank you for your help !

Kind regards,

Thomas