Excel import option to change category.

Hi;

I am using excel sheets to add products to my web page. Trying to change categories of my products (sample: category id: 65;76 to 50;78) but after uploading that excel file i get the result of my categories as category id:65;76;50;78. Need to delete 65;76 and change them to 50;78 with using excel import. Need help about this situation. Best Regards.

I'm not sure but it seems to me you need first to manually delete the products in the old categories and then add them in the new categories via import of the excel file.