I’m trying to fine tune an existing model, I’ve created a custom Dataset class and included iscrowd key in my get_item() (based on what is done here 5),
but I keep getting:

site-packages/pycocotools/cocoeval.py", line 188, in 
iscrowd = [int(o[‘iscrowd’]) for o in gt]
KeyError: ‘iscrowd’

it seems to run fine without GPU.
Can anyone help?