Hmm, that looks like your Banned table has a field in there that should no longer be there. That table used to have a couple fields, but in 6.5 it was reduced to 1 field. Definitely not an issue with 7.0.
Run this command from the SQL area:
show fields from w3t_Banned
The only field that should be there is B_Hostname. If there are more than that, the others need to be dropped. If you're not sure how to drop the field, just post here what fields came back from the query above.
