Do You Recognize This Disease?
I move it out side in the summer. It might get too much sun sometimes. The broken part above is where it first had the disease and broke off this past summer.
Certified GKH Gardening Expert
It looks like a bacterial rot. You might notice browning and black tips on leaves, as well.
The shoots coming from the bottom will be your replacement. Choose one, and cut everything else down, carefully, without breaking your best shoot.
Changing the soil then treating with a fungicide is the best option, but if this is not possible, then you can treat the soil and plant with a fungicide. Leaving it in the infected soil may not lead to a full recovery, though.
Here is an article that will help with fungicide use: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm