CLion Project Generated from Unreal 4 Shows All Unreal Engine Source Files

I am not sure this is the intended behavior but when I use Unreal (version 4.21.2) to create a C++ Basic Code project with Starter Content, it creates a CLion project with all the engine source code in the Library pane underneath the project folder (see attached pic). I did not make any changes. It is a new project created in Unreal. Any way to hide or not show these files in the CLion Project window or is the setup generated by Unreal not correct?