after training output Test: [2499/2500]
and afterIoU metric: bbox
Average Recall (AR) @[ IoU=0.50:0.95 | area= large | maxDets=100 ] = 0.000

it shows
Traceback (most recent call last):
File "main.py", line 239, in
main(args)
File "main.py", line 209, in main
log_stats = {**{f'train_{k}': v for k, v in train_stats.items()},
NameError: name 'train_stats' is not defined

which means no variable named train_stats, and i searched train_stats in main.py, where only one train_stats exists and it isnt a defining statement. could you help with this please? thank you for your reply.