smf upgrade error smf 2.0 RC2 Unknown column 'a.file_hash' in 'field list'

[Tony]

Question?
After my upgrade to smf 2.0 RC2
I get an error:

Unknown column 'a.file_hash' in 'field list'
File: /home/wwwsys/public_html/smf/Sources/Display.php
Line: 949

Note: It appears that your database may require an upgrade. Your forum's files are currently at version SMF 2.0 RC2, while your database is at version 2.0 RC1. The above error might possibly go away if you execute the latest version of upgrade.php

[Tony]

As a temporary fix I noticed an article on the web
From your smf forum
Disable Attachments
Admin/forum/attachments and avatars/attachments settings/attachments mode/ disable attachments
Save
The forum is working now but without attachments.
Will try and update the database later.
Tony