Issues migrating Craft site to a new host
Sounds like the database you restored on the new server isn't matching the files that are in place on that server.

Check the craft/app/Info.php file's CRAFT_BUILD and CRAFT_VERSION numbers and make sure they match what's in the version and build in the craft_info table in the database.

If you need to download a previous version of Craft to get a different build/version of the files, you can do so like this.