Bike trainer destroyed my tire

As the title suggests, I didn’t realize the potential danger to my tire with using a bike trainer. My parents had this in their garage for ages and I decided to take it home and try it out. I ride a Giant Defy 2 with SR-2 wheels. These tires were probably the cheaper ones available at LBS that I purchased in July. I don’t ride significant mileage to wear them down too quickly.

Here’s a picture of the rear tire, it’s well worn in the center of the tire now. Any suggestions? Brief online research says that some people have a 2nd wheel specific for training with an indoor tire. I’d rather not have to get another wheel. I’ve been thinking about getting a new bike but I don’t need one just yet.

https://i.imgur.com/g3MseP5.jpg