Upgrade issue - error code 1054 (From 1.2.5 to 1.2.7)

[zack]

Hi, guys. Thanks for the abantecart this great system!

We have got the error after the system been upgrade to 1.2.7. (We have upgrade our system by doing it on the admin page - Extensions - Install Extensions - abantecart_upgrade_127) It comes with the error in front page:
SQL Error: Unknown column 'tr.tax_exempt_groups' in 'field list'
Error No: 1054

Have no idea on how to fix that issue, it will be appreciated for any advise. Our website was: www dot z-mart dot com dot au

Cheers,
Zack

[Basara]

Hello.

You need update 1.2.5 to 1.2.6 and only after this upgrade it to 1.2.7