Thread:Project:Support desk/Database error: "1054: Unknown column 'rev sha1' in 'field list' (localhost)"

I have wiki on my old laptop (MediaWiki:1.17.0 MySQL:5.5.21 PHP:5.3.18 phpMyAdmin: 3.5.3). Now I've decided to move it to my new laptop (MediaWiki:1.20.3 MySQL:5.5.29 PHP:5.4.12 phpMyAdmin:3.5.7). By phpMyAdmin interface i have exported the database on my old laptop and in the same way imported it on my new laptop. After setting the user account and restarting the apache and mysql services, while trying to access my wiki from browser i receive the following error message:

A database query syntax error has occurred. This may indicate a bug in the software. The last attempted database query was: (SQL query hidden) from within function "Revision::fetchFromConds". Database returned error "1054: Unknown column 'rev_sha1' in 'field list' (localhost)".

Am I missing smth? Anyway I do appreciate the real help to solve the issue.

NB. At LocalSettings.php on my old laptop there are was a line $wgDBprefix = "mdw_"; which I copied to LocalSettings.php on new laptop.