4 hours ago, pietpetoors said:I tried upgrading from 1.6.1.18 to 1.7.5 using the latest version of 1 Click last night and it still failed.
See
https://www.prestashop.com/forums/topic/949788-upgrade-from-1614-to-1750-failed/
Hello,
You will not be able to upgrade from PrestaShop 1.6 to 1.7 using the standard update module in 1 click, this will never work, the developers have broken this feature.
You can create 2 shops at 1.7, buy our module 1-Click PrestaShop Update or Migrate and transfer data, this is the only and best option that is possible.