Class 'Language' not found while upgrading from 1.6 to 1.7

[sitte]

I'm trying to upgrade presta 1.6 to 1.7 with 1-click upgrade module.

1. I cannot see 1.7 in versions list (I set major release but 1.6.1.17 is newest one)
2. I downloaded official prestashop_1.7.2.4.zip and I extracted it to /admin*/autoupgrade/latest/prestashop/ folder
3. I set 1-click upgrade to update from folder, it process files but when it starts to process database it fails:

   ...
   640 plików do zaktualizowania.
   40 plików do zaktualizowania.
   Wszystkie pliki uaktualniono. Aktualizacja bazy danych...
   [Ajax / Server Error for action upgradeDb] textStatus: "error " errorThrown:"Internal Server Error " jqXHR: " "

    

4. in error file I have:

   [08-Dec-2017 15:02:39 Europe/Paris] PHP Fatal error:  Class 'Language' not found in /home/sklad/domain name/admin*/autoupgrade/latest/prestashop/install/upgrade/php/migrate_tabs_17.php on line 54

    

5. Any sugestion?

[bellini13]

The upgrade module does not support major upgrades from v1.6 to v1.7