Lora OTAA error(lorawan1.03)


while i use lora otaa mode to activate the device, the loraserver has already received the package and give the right device address, when the otaa is over, the device starts to transfer the comfirmdata(uplink), the loraserver found the error just like the pic shows.this problem disturb me for a month, please help me to solve the problem

Please see OTAA failed / Debugging device activation OTAA issues.