Hi! New here and I need help with a Peruvian apple cactus. I received this cactus as a gift about 4 years ago and it has done very well over the few years. It sits in a very bright room with bright indirect light half of the day and bright direct light half the day in a room that is entirely windows on one side. I don't water it often although we do travel frequently and rent our house and I worry maybe someone did water it while we were gone this winter. It seemed to have collapsed out of nowhere when we returned. I hadn't noticed any rot or discoloration (although tbh I hadn't checked in with it in a few weeks) and one day I looked over and it had flopped over in half. It is very soft as well and definitely feels Rotted. Is it possible to save it if I amputate? Clearly I would need to cut it very low close to the base from previous posts I've read. The brown calloused spot at the base also has been there the entire time I've had the cactus and that spot is hard, as it always has been. Please help!
