Another strange importing error

Here we go again with my CSV importing errors, we imported a file that was not correct and now when I try to re-import I get:

"The product is of the type but it already exists in the database and is of the type main. In order to avoid any problem the product insertion process has been skipped. Please correct its type before trying to reimport it."

I have deleted the old products with the same code but still get the message, the CSV looks as follows:

product_name;product_description;product_code;product_parent_id;product_weight;product_keywords;product_meta_description;price_value;storlek;images;categories;price_currency_id
Hollister T-shirt Dam;Hollister T-shirt Dam;447917;;1;Hollister Dam;Hollister Dam;149;m;447917.jpg;2,16,983,984,15,831,672,985,;150
;;447917 s;447917;;;;;s;;;
;;447917 m;447917;;;;;m;;;
;;447917 l;447917;;;;;l;;;

I see the problem is that one of my co-workers imported a file with two colums "product_code" do we have to delete these in the DB? I can't find them in the back end.