I’ve come across the same issue using a Patriot P310 (240GB) and it’s happening when using gen2 and gen3 speeds. I’m not seeing as many errors as some people (I had two errors close to each other when running ‘dmesg | grep pcie’).
Could someone in Pimoroni please confirm if these error messages are something to worry about or if they can be simply ignored (do I need to re-seat the PCIe cable)?