Validation Error: Listener XXXX already exists

I’m starting to develop on a project and clone our repository.

Now, checking the code, I tried to see an Entity Listener, and when I “Edit” it, and press Source, I get this error.
If I press IDE it opens correctly on IDEA, but don’t know how to stop getting this error from Cuba Studio (web version 6.9)

imagen

Hi,
This error message means that there already exists a class with the name “EmpleadoEntityListener” in that package. Have you modified the “Class name” property before switching to the “source” tab?

Which Version Control System do you use? I have tried to reproduce the problem in my project (cloned from GitHub) but everything works well.

Which version of CUBA Studio do you use?