Learn SQL by Building a Student Database: Part 2 (SOLVED)

I’m stuck on step 4 of the tutorial. I’m already in the project folder and even copy-pasted psql -U postgres < students.sql into the terminal, yet I can’t pass. I have tried dropping the students database and entered the command again, but it doesn’t work. What should I do?

EDIT: Problem solved. I renamed the old project folder, made a new (empty) project folder and redo the tutorial from there.