diff --git a/core/src/Catalogue/CatalogueController.cpp b/core/src/Catalogue/CatalogueController.cpp
index af80207..cf5d9e9 100644
--- a/core/src/Catalogue/CatalogueController.cpp
+++ b/core/src/Catalogue/CatalogueController.cpp
@@ -184,7 +184,6 @@ void CatalogueController::addEvent(std::shared_ptr<DBEvent> event)
         impl->m_CatalogueDao.updateEvent(eventTemp);
     }
 
-
     // update event parameter
     auto uniqIdPredicate = std::make_shared<ComparaisonPredicate>(
         QString{"uniqId"}, event->getUniqId(), ComparaisonOperation::EQUALEQUAL);
@@ -197,9 +196,11 @@ void CatalogueController::addEvent(std::shared_ptr<DBEvent> event)
     workPred->AddRequestPredicate(uniqIdPredicate);
     workPred->AddRequestPredicate(workRepositoryPredicate);
 
-
     auto workEvent = impl->m_CatalogueDao.getEvent(workPred);
     *event = workEvent;
+
+    auto uniqueId = impl->eventUniqueKey(event);
+    impl->m_EventKeysWithChanges.insert(uniqueId);
 }
 
 void CatalogueController::saveEvent(std::shared_ptr<DBEvent> event)
diff --git a/gui/src/Catalogue/CatalogueActionManager.cpp b/gui/src/Catalogue/CatalogueActionManager.cpp
index 685b679..398c83d 100644
--- a/gui/src/Catalogue/CatalogueActionManager.cpp
+++ b/gui/src/Catalogue/CatalogueActionManager.cpp
@@ -90,14 +90,21 @@ void CatalogueActionManager::installSelectionZoneActions()
     auto &actionController = sqpApp->actionsGuiController();
 
     auto createEventEnableFuntion = [](auto zones) {
-        QSet<VisualizationGraphWidget *> usedGraphs;
+
+        // Checks that all variables in the zones doesn't refer to the same product
+        QSet<QString> usedDatasource;
         for (auto zone : zones) {
             auto graph = zone->parentGraphWidget();
-            if (!usedGraphs.contains(graph)) {
-                usedGraphs.insert(graph);
-            }
-            else {
-                return false;
+            auto variables = graph->variables();
+
+            for (auto var : variables) {
+                auto datasourceId = var->metadata().value(DataSourceItem::ID_DATA_KEY).toString();
+                if (!usedDatasource.contains(datasourceId)) {
+                    usedDatasource.insert(datasourceId);
+                }
+                else {
+                    return false;
+                }
             }
         }
 
diff --git a/gui/src/Catalogue/CatalogueEventsWidget.cpp b/gui/src/Catalogue/CatalogueEventsWidget.cpp
index 806abd1..d55ec11 100644
--- a/gui/src/Catalogue/CatalogueEventsWidget.cpp
+++ b/gui/src/Catalogue/CatalogueEventsWidget.cpp
@@ -27,6 +27,7 @@ struct CatalogueEventsWidget::CatalogueEventsWidgetPrivate {
     QStringList m_ZonesForTimeMode;
     QString m_ZoneForGraphMode;
     QVector<std::shared_ptr<DBCatalogue> > m_DisplayedCatalogues;
+    bool m_AllEventDisplayed = false;
 
     VisualizationWidget *m_VisualizationWidget = nullptr;
 
@@ -389,7 +390,7 @@ QVector<std::shared_ptr<DBCatalogue> > CatalogueEventsWidget::displayedCatalogue
 
 bool CatalogueEventsWidget::isAllEventsDisplayed() const
 {
-    return impl->m_DisplayedCatalogues.isEmpty() && !impl->m_Model->events().isEmpty();
+    return impl->m_AllEventDisplayed;
 }
 
 bool CatalogueEventsWidget::isEventDisplayed(const std::shared_ptr<DBEvent> &event) const
@@ -401,6 +402,7 @@ void CatalogueEventsWidget::populateWithCatalogues(
     const QVector<std::shared_ptr<DBCatalogue> > &catalogues)
 {
     impl->m_DisplayedCatalogues = catalogues;
+    impl->m_AllEventDisplayed = false;
 
     QSet<QUuid> eventIds;
     QVector<std::shared_ptr<DBEvent> > events;
@@ -421,6 +423,7 @@ void CatalogueEventsWidget::populateWithCatalogues(
 void CatalogueEventsWidget::populateWithAllEvents()
 {
     impl->m_DisplayedCatalogues.clear();
+    impl->m_AllEventDisplayed = true;
 
     auto allEvents = sqpApp->catalogueController().retrieveAllEvents();
 
@@ -435,15 +438,16 @@ void CatalogueEventsWidget::populateWithAllEvents()
 void CatalogueEventsWidget::clear()
 {
     impl->m_DisplayedCatalogues.clear();
+    impl->m_AllEventDisplayed = false;
     impl->setEvents({}, this);
 }
 
 void CatalogueEventsWidget::refresh()
 {
-    if (impl->m_DisplayedCatalogues.isEmpty()) {
+    if (isAllEventsDisplayed()) {
         populateWithAllEvents();
     }
-    else {
+    else if (!impl->m_DisplayedCatalogues.isEmpty()) {
         populateWithCatalogues(impl->m_DisplayedCatalogues);
     }
 }