Update - I cut it… but do I need to cut more? This is after about an hour. Hi! I’ve had this cactus for 17 years… it’s the baby of my dad’s cactus and has flowered and birth new cacti once (in 2023 or so). It was looking just fine in late Aug, but it now has a lot of black on the base. The obvious answer is root rot, which Dr. Planta also suspects, but it’s not soft at all. I read online that it could be corking as well. We’ve been getting short, heavy rain this summer, so even though I haven’t watered it much - overwatering is possible. Any insights? Thank you!