I have not found the solution, but I think I’m on track. The problem apparently is in the table usermeta, I believe that any plugin that I used previously should have added a field that is generating this error.
I made the test and when a deactivate the forums component, the problem disappear.
I reinstalled the bbforum, deleted the buddypress, cleaned the tables, but nothing made the error finally disappear. The most strange is that I created a test installation in other site and everything it´s working.