diff --git a/gui/include/Catalogue/CatalogueEventsWidget.h b/gui/include/Catalogue/CatalogueEventsWidget.h
index b40dfca..287aa7f 100644
--- a/gui/include/Catalogue/CatalogueEventsWidget.h
+++ b/gui/include/Catalogue/CatalogueEventsWidget.h
@@ -30,6 +30,8 @@ signals:
     void selectionZoneAdded(const std::shared_ptr<DBEvent> &event, const QString &productId,
                             VisualizationSelectionZoneItem *selectionZone);
 
+    void eventCataloguesModified(const QVector<std::shared_ptr<DBCatalogue> > &catalogues);
+
 public:
     explicit CatalogueEventsWidget(QWidget *parent = 0);
     virtual ~CatalogueEventsWidget();
diff --git a/gui/src/Catalogue/CatalogueEventsWidget.cpp b/gui/src/Catalogue/CatalogueEventsWidget.cpp
index e28e4b6..8d1e4ff 100644
--- a/gui/src/Catalogue/CatalogueEventsWidget.cpp
+++ b/gui/src/Catalogue/CatalogueEventsWidget.cpp
@@ -396,12 +396,19 @@ CatalogueEventsWidget::CatalogueEventsWidget(QWidget *parent)
             if (canRemoveEvent) {
                 for (auto event : events) {
                     if (this->isAllEventsDisplayed()) {
+                        sqpApp->catalogueController().removeEvent(event);
                         impl->removeEvent(event, ui->treeView);
                     }
                     else {
+                        QVector<std::shared_ptr<DBCatalogue> > modifiedCatalogues;
                         for (auto catalogue : this->displayedCatalogues()) {
-                            catalogue->removeEvent(event->getUniqId());
-                            sqpApp->catalogueController().updateCatalogue(catalogue);
+                            if (catalogue->removeEvent(event->getUniqId())) {
+                                sqpApp->catalogueController().updateCatalogue(catalogue);
+                                modifiedCatalogues << catalogue;
+                            }
+                        }
+                        if (!modifiedCatalogues.empty()) {
+                            emit eventCataloguesModified(modifiedCatalogues);
                         }
                     }
                     impl->m_Model->removeEvent(event);
diff --git a/gui/src/Catalogue/CatalogueExplorer.cpp b/gui/src/Catalogue/CatalogueExplorer.cpp
index 3ce453a..358c144 100644
--- a/gui/src/Catalogue/CatalogueExplorer.cpp
+++ b/gui/src/Catalogue/CatalogueExplorer.cpp
@@ -135,6 +135,13 @@ CatalogueExplorer::CatalogueExplorer(QWidget *parent)
                 sqpApp->catalogueController().updateEventProduct(eventProduct);
                 ui->events->setEventChanges(event, true);
             });
+
+    connect(ui->events, &CatalogueEventsWidget::eventCataloguesModified,
+            [this](const QVector<std::shared_ptr<DBCatalogue> > &catalogues) {
+                for (auto catalogue : catalogues) {
+                    ui->catalogues->setCatalogueChanges(catalogue, true);
+                }
+            });
 }
 
 CatalogueExplorer::~CatalogueExplorer()
diff --git a/gui/src/Catalogue/CatalogueTreeItems/CatalogueTreeItem.cpp b/gui/src/Catalogue/CatalogueTreeItems/CatalogueTreeItem.cpp
index 9ec3f9b..a5bec27 100644
--- a/gui/src/Catalogue/CatalogueTreeItems/CatalogueTreeItem.cpp
+++ b/gui/src/Catalogue/CatalogueTreeItems/CatalogueTreeItem.cpp
@@ -111,16 +111,13 @@ bool CatalogueTreeItem::dropMimeData(const QMimeData *data, Qt::DropAction actio
         if (action == Qt::MoveAction) {
             for (auto catalogue : sourceCatalogues) {
                 catalogue->removeEvent(event->getUniqId());
+                sqpApp->catalogueController().updateCatalogue(catalogue);
             }
         }
 
         impl->m_Catalogue->addEvent(event->getUniqId());
+        sqpApp->catalogueController().updateCatalogue(impl->m_Catalogue);
     }
-
-    for (auto catalogue : sourceCatalogues) {
-        sqpApp->catalogueController().updateCatalogue(catalogue);
-    }
-    sqpApp->catalogueController().updateCatalogue(impl->m_Catalogue);
 }
 
 std::shared_ptr<DBCatalogue> CatalogueTreeItem::catalogue() const