Uploading annotations

I’m working on an image segmentation dataset, and I’m have trouble with the annotations. I created a coco.json file storing the annotations and tried to upload them with the images, and found that I got ‘null annotations’ because ‘width and height are negative’ (I checked, the height and width were NOT negative).

Now I can’t seem to upload any annotation files for the already uploaded images. I really don’t want to have to start uploading the images all over again, because it takes at least an hour to upload all the images.