I would make sure you ran all the upgrades you needed to.
Your missing a field or so from your cats table.
If you run this query in phpmyadmin you should be able to find out which one
SELECT catname,extra1,extra2,extra3,extra4,extra5,extra6,template,thumbnail FROM rp_categories
Note this below
template was added in the 2.1 upgrade
thumbnail was added in the 2.5 upgrade
the extra fields where added in the 2.9-3.0 upgrade
There is nothing missing from the upgrade scripts