Can't change carriers: Ranges are overlapping in Core developers Posted September 6 On 12/28/2020 at 9:38 AM, Valentina Calzature said: Hello, I did that, but after doing so the carrier is not showing anymore in back office. it still works, as the shippings are correctly calculated in the orders. It was carried ID 152, now in back office I see only carrierd id 153, but empty. The ID 152 is correctly showing and working in phpmyadmin. How can I make it show in prestashop back office? Thanks! You have to correct the overlapping Delimiter 1 and 2. If this is not working, Truncate all carrier tables in db including the ps_range_weight. This helpt for me and all is working fine now. No new errors.