Today, I inadvertently initiated a GPS-tracked activity indoors, while cooking in the kitchen. Once I noticed, I stopped the activity and tried to discard it. The watch has been stuck discarding this activity for hours, draining the battery and not responding to any of the buttons. Right now, it's plugged in but it still shows a discarding message, with an endlessly spinning blue circle. How do I stop this discarding and reset the watch to a point where it's usable again?