diff --git a/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetProfileManager.java b/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetProfileManager.java
index c78d0978a..cf1a17e1a 100644
--- a/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetProfileManager.java
+++ b/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetProfileManager.java
@@ -277,6 +277,9 @@ public class DatasetProfileManager {
 
     public void storeDatasetProfileUsers(DatasetProfile entity, eu.eudat.models.data.admin.composite.DatasetProfile model) {
         if (model.getUsers() != null && !model.getUsers().isEmpty()) {
+            if (entity.getUsers() == null) {
+                entity.setUsers(new HashSet<>());
+            }
             model.getUsers().stream().filter(userInfoListingModel -> entity.getUsers().stream().filter(userDatasetProfile -> userDatasetProfile.getUser().getId().equals(userInfoListingModel.getId())).count() == 0).forEach(userInfoListingModel -> {
                 UserDatasetProfile userDatasetProfile1 = new UserDatasetProfile();
                 userDatasetProfile1.setDatasetProfile(entity);