diff --git a/crafter.cs b/crafter.cs
index c603158..739c716 100644
--- a/crafter.cs
+++ b/crafter.cs
@@ -16,6 +16,7 @@ public class CourseCrafter
         = new();
     public static void Craft()
     {
+        GeneratedCourses = new();
         var settings = Settings.Instance;
         var students = settings.Students;
         var sports = settings.Sports;