Decompiling a .class file each time it starts up

IntelliJ decompiles a file each time I run the application. It takes about 3-5 minutes to finish.

I have tried to close all the tabs before closing the App and then start it again but it still happens always. I even don't remember if I ever worked on this .class file in my project.

Question: How can I prevent it from decompiling the .class file each time on start up.

Thanks!