You need to check your database. Specifically the aatrade_class_modules_commodities table. I bet it doesn't have anything in it for the prate.
I would say that you haven't really applied the patch or your server is not letting the install code DELETE the tables and it is using OLD tables.
It was talked about here
viewtopic.php?f=38&t=3161&p=16198&hilit=commodities+table#p16198This is what the patch addressed. I bet your admin has the ability to delete tables disabled. I say this because if you have installed that one patch file for this problem it DOES fix it.
This line in the patch file...
$res = $db->Execute("DROP TABLE IF EXISTS `{$db_prefix}class_modules_commodities`");
Will delete the table so a new one can be created.
If you look at the structure of the commodities table and the prate field isn't
double(32,5) then either the patch is not really installed or the server is caching files and not updating them when a new one is uploaded or mysql has privilege for dropping/deleting tables disabled for the account you are using.