I want to add one more class to the yolov5-seg.pt file.

[4yafes6]

In the yolov5-segmentation model, there are 80 classes provided by COCO, and with the yolov5-seg.pt file I obtained from your GitHub account, I am able to detect and perform segmentation on these 80 classes as desired. What I want is to add my own custom class to these 80 classes, so that the yolov5-seg.pt file would have a total of 81 classes. However, I don't want to retrain the other 80 classes, I only want to train my custom class.

For example, I have labeled images and their corresponding annotations for object "A", separated into train and val sets. I only want to train this object "A" and have the yolov5-seg.pt file contain 80 classes + class "A" (81 classes in total).