diff --git a/src/main/java/de/thm/arsnova/services/QuestionService.java b/src/main/java/de/thm/arsnova/services/QuestionService.java
index 62b68b5de6527b1abba534b792d90d2435d53350..a3bb20a5e5bbf9dfc043df36f8c3c52d3b22bf22 100644
--- a/src/main/java/de/thm/arsnova/services/QuestionService.java
+++ b/src/main/java/de/thm/arsnova/services/QuestionService.java
@@ -905,7 +905,8 @@ public class QuestionService implements IQuestionService, ApplicationEventPublis
 		SortOrder sortOrder = databaseDao.getSortOrder(question.getSessionId(), question.getQuestionVariant(), question.getSubject());
 		if (sortOrder != null) {
 			List<String> tempSortOrder = sortOrder.getSortOrder();
-			sortOrder.setSortOrder(tempSortOrder.remove(question.get_id()));
+			tempSortOrder.remove(question.get_id());
+			sortOrder.setSortOrder(tempSortOrder);
 			if (sortOrder.getSortOrder().isEmpty()) {
 				databaseDao.deleteSortOrder(sortOrder);
 				SortOrder subjectSortOrder = databaseDao.getSortOrder(sortOrder.getSessionId(), sortOrder.getQuestionVariant(), "");