operator+/- is disabled for QFlags in qt6

src/akonadi-contacts/standardcontactactionmanager.cpp

@@ -579,7 +579,7 @@ QAction *StandardContactActionManager::createAction(Type type)
         action->setWhatsThis(i18n("Create a new contact<p>You will be presented with a dialog where you can add data about a person, including addresses and phone numbers.</p>"));
         d->mActions.insert(CreateContact, action);
         d->mActionCollection->addAction(QStringLiteral("akonadi_contact_create"), action);
-        d->mActionCollection->setDefaultShortcut(action, QKeySequence(Qt::CTRL + Qt::Key_N));
+        d->mActionCollection->setDefaultShortcut(action, QKeySequence(Qt::CTRL | Qt::Key_N));
         connect(action, &QAction::triggered, this, [this]() {
             d->slotCreateContact();
         });
@@ -591,7 +591,7 @@ QAction *StandardContactActionManager::createAction(Type type)
         action->setWhatsThis(i18n("Create a new group<p>You will be presented with a dialog where you can add a new group of contacts.</p>"));
         d->mActions.insert(CreateContactGroup, action);
         d->mActionCollection->addAction(QStringLiteral("akonadi_contact_group_create"), action);
-        d->mActionCollection->setDefaultShortcut(action, QKeySequence(Qt::CTRL + Qt::Key_G));
+        d->mActionCollection->setDefaultShortcut(action, QKeySequence(Qt::CTRL | Qt::Key_G));
         connect(action, &QAction::triggered, this, [this]() {
             d->slotCreateContactGroup();
         });