Error in Block admin

I upgraded my site to V5 but had problems with Marvin theme so I went back to 4.7. I now get the following error in admin/block

user warning: Unknown column 'title' in 'field list' query: SELECT bid, title, info FROM boxes ORDER BY title in /home/robonlin/public_html/cor/includes/database.mysql.inc on line 121.

I have looked in the boxes table but can't see anything that looks odd there.

Any ideas?

Thanks

Rob