u/Cool-Lavishness-9270

As the title says. I also had multiple short-term entries in the past purely for tourism purposes, and I still have 4 years until my visa expires. However, this camp is 3 weeks long, and I am also going to see my friends after the camp. This camp is purely academic, not for leisure/language exchange purposes. I am not getting paid (unless them giving temporary accommodation counts, but I will not be receiving money), and is not business-related whatsoever.

The organizing committee recommends everyone to apply for an F-visa. But I feel quite reluctant as it will cancel my L visa with 4 years remaining, and might not be able to see my friends after the camp.

What should I do?