diff --git a/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetManager.java b/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetManager.java
index bf4b7b7a8..8949d2c74 100644
--- a/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetManager.java
+++ b/dmp-backend/web/src/main/java/eu/eudat/logic/managers/DatasetManager.java
@@ -401,10 +401,12 @@ public class DatasetManager {
 
     public eu.eudat.data.entities.Dataset createOrUpdate(DatasetWizardModel datasetWizardModel, Principal principal) throws Exception {
         DMP dmp = apiContext.getOperationsContext().getDatabaseRepository().getDmpDao().find(datasetWizardModel.getDmp().getId());
-        Dataset tempDataset = apiContext.getOperationsContext().getDatabaseRepository().getDatasetDao().find(datasetWizardModel.getId());
-        if (tempDataset != null) {
-            if (datasetWizardModel.getModified().getTime() != tempDataset.getModified().getTime()) {
-                throw new Exception("Dataset has been modified already by another user.");
+        if (datasetWizardModel.getId() != null) {
+            Dataset tempDataset = apiContext.getOperationsContext().getDatabaseRepository().getDatasetDao().find(datasetWizardModel.getId());
+            if (tempDataset != null) {
+                if (datasetWizardModel.getModified().getTime() != tempDataset.getModified().getTime()) {
+                    throw new Exception("Dataset has been modified already by another user.");
+                }
             }
         }
         if (dmp.getStatus().equals(DMP.DMPStatus.FINALISED.getValue()) && datasetWizardModel.getId() != null)
diff --git a/dmp-frontend/src/app/ui/dataset/dataset-wizard/dataset-wizard-editor.model.ts b/dmp-frontend/src/app/ui/dataset/dataset-wizard/dataset-wizard-editor.model.ts
index e26947c50..ae6064621 100644
--- a/dmp-frontend/src/app/ui/dataset/dataset-wizard/dataset-wizard-editor.model.ts
+++ b/dmp-frontend/src/app/ui/dataset/dataset-wizard/dataset-wizard-editor.model.ts
@@ -145,7 +145,7 @@ export class DatasetWizardEditorModel {
 		baseContext.validation.push({ key: 'dmp', validators: [BackendErrorValidator(this.validationErrorModel, 'dmp')] });
 		baseContext.validation.push({ key: 'datasetProfileDefinition', validators: [BackendErrorValidator(this.validationErrorModel, 'datasetProfileDefinition')] });
 		baseContext.validation.push({ key: 'tags', validators: [BackendErrorValidator(this.validationErrorModel, 'datasetProfileDefinition')] });
-		baseContext.validation.push({ key: 'modified', validators: [Validators.required]});
+		baseContext.validation.push({ key: 'modified', validators: []});
 		return baseContext;
 	}
 }
diff --git a/dmp-frontend/src/app/ui/dmp/editor/dmp-editor.model.ts b/dmp-frontend/src/app/ui/dmp/editor/dmp-editor.model.ts
index fc48cec5a..105747e01 100644
--- a/dmp-frontend/src/app/ui/dmp/editor/dmp-editor.model.ts
+++ b/dmp-frontend/src/app/ui/dmp/editor/dmp-editor.model.ts
@@ -131,7 +131,7 @@ export class DmpEditorModel {
 		baseContext.validation.push({ key: 'datasetsToBeFinalized', validators: [BackendErrorValidator(this.validationErrorModel, 'datasetsToBeFinalized')] });
 		baseContext.validation.push({ key: 'associatedUsers', validators: [BackendErrorValidator(this.validationErrorModel, 'associatedUsers')] });
 		baseContext.validation.push({ key: 'users', validators: [BackendErrorValidator(this.validationErrorModel, 'users')] });
-		baseContext.validation.push({ key: 'modified', validators: [Validators.required] });
+		baseContext.validation.push({ key: 'modified', validators: [] });
 		return baseContext;
 	}
 }