diff --git a/src/Handler/Course/Register.hs b/src/Handler/Course/Register.hs
index 92297d3d9..c4e770f9f 100644
--- a/src/Handler/Course/Register.hs
+++ b/src/Handler/Course/Register.hs
@@ -273,7 +273,6 @@ deleteApplicationFiles appId = deleteWhere [ CourseApplicationFileApplication ==
 
 deregisterParticipant :: UserId -> CourseId -> DB ()
 deregisterParticipant uid cid = do
-  deleteApplications uid cid
   part <- fmap (assertM . has $ _entityVal . _courseParticipantState . _CourseParticipantActive) . getBy $ UniqueParticipant uid cid
   forM_ part $ \(Entity partId CourseParticipant{}) -> do
     update partId [CourseParticipantState =. CourseParticipantInactive False]