Issue: Errors when uninstalling vaultwiki

Database error in vBulletin 4.2.0:

Invalid SQL:

                ALTER TABLE thread

        DROP vault_description
        DROP INDEX firstpostid;

MySQL Error   : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DROP INDEX firstpostid' at line 4
Error Number  : 1064
Request Date  : Sunday, July 15th 2012 @ 04:27:12 PM
Error Date    : Sunday, July 15th 2012 @ 04:27:15 PM
Script        : forums/admincp/plugin.php?do=productkill
Referrer      : forums/admincp/plugin.php?do=productdelete&productid=ces_nwsp_spec&s=
Classname     : vB_Database
MySQL Version : 5.5.24-0ubuntu0.12.04.1

Database error in vBulletin 4.2.0:

Invalid SQL:

                                        SELECT languageid,
                        phrasegroup_global AS phrasegroup_global,
                        phrasegroup_posting AS phrasegroup_posting,
                        phrasegroup_postbit AS phrasegroup_postbit,
                        phrasegroup_vaultarticles AS phrasegroup_vaultarticles,
                        phrasegroup_showthread AS phrasegroup_showthread,
                        phrasegroup_vbmediawikiglobal AS phrasegroup_vbmediawikiglobal,
                        phrasegroupinfo AS lang_phrasegroupinfo,
                        options AS lang_options,
                        languagecode AS lang_code,
                        charset AS lang_charset,
                        locale AS lang_locale,
                        imagesoverride AS lang_imagesoverride,
                        dateoverride AS lang_dateoverride,
                        timeoverride AS lang_timeoverride,
                        registereddateoverride AS lang_registereddateoverride,
                        calformat1override AS lang_calformat1override,
                        calformat2override AS lang_calformat2override,
                        logdateoverride AS lang_logdateoverride,
                        decimalsep AS lang_decimalsep,
                        thousandsep AS lang_thousandsep
                                        FROM language
                                        WHERE languageid = 1;

MySQL Error   : Unknown column 'phrasegroup_vaultarticles' in 'field list'