"According to reports, 22-year-old student pilot named Rosario already had a private pilot license but was still building up her flying hours, meaning she was required to fly with an instructor or safety pilot."

Probably instrument rating

In the future, its usually a good idea to read the article before chiming in.

Before you get any kind of full license or certificate you usually need to do a certain number of solo hours as a student where you literally fly alone as the pilot in command, before you have your license.