Pixhawk ESC Calibration

Hello everyone,

I am using 6s lipo for only supplying 270 kv motor. for pixhawk and two 1400 k motors I am using 2s lipo. But problem is esc calibration. I clicked esc calibration button on qgroundcontrol, plug the two sockets but 270 kv motor cant calibrate. So how to solve this issue?

Best regards,