diff --git a/src/main/java/org/olat/group/manager/BusinessGroupServiceImpl.java b/src/main/java/org/olat/group/manager/BusinessGroupServiceImpl.java
index 832789935986878c55cecc1c1daa901a29082a94..64cb42baa3f836a1720bdafcd33163d2da2c1715 100644
--- a/src/main/java/org/olat/group/manager/BusinessGroupServiceImpl.java
+++ b/src/main/java/org/olat/group/manager/BusinessGroupServiceImpl.java
@@ -1444,7 +1444,7 @@ public class BusinessGroupServiceImpl implements BusinessGroupService, UserDataD
 				List<Identity> ownerList = securityManager.getIdentitiesOfSecurityGroups(ownerSecGroups);
 				repoTutorList.retainAll(ownerList);
 				if(!dryRun) {
-					repositoryManager.removeTutors(null, repoTutorList, entry);
+					repositoryManager.removeTutors(ureqIdentity, repoTutorList, entry);
 				}
 				count += repoTutorList.size();
 			}