You should notice that Prestashop has some product description peculiarities – they are limited to 400 and 800 symbols by default. Therefore after migration, your descriptions may be cut to fit Prestashop framework in case they are longer. So you can’t migrate full description to Prestashop. You can contact to PrestaShop support in order to customize PrestaShop code and extend limits set by default in cart’s files. After that, you totally redo the migration again and with our extended feature of Clear data on the target site, your data will not be duplicated.