A problem with default gpu

The gpu default configuration in the file is 1. However I only have one gpu, so it cant work out by just copying the instruction.
As a beginner ,it is very hard for me to find out the bug. So I think it is better to set default gpu to 0.
https://github.com/HiLab-git/PyMIC_examples/blob/main/seg_ssl/ACDC/config/unet2d_baseline.cfg
line 62