--- a/src/gui/dialog/settings/library.cc	Tue Jan 16 15:22:29 2024 -0500
+++ b/src/gui/dialog/settings/library.cc	Fri Jan 19 00:24:02 2024 -0500
@@ -19,21 +19,6 @@
 #include <algorithm>
 #include <iostream>
 
-class DroppableListWidget : public QListWidget {
-	Q_OBJECT
-
-public:
-	explicit DroppableListWidget(QWidget* parent);
-
-signals:
-	void FilesDropped(QStringList list);
-
-protected:
-	void dragEnterEvent(QDragEnterEvent* event) override;
-	void dragMoveEvent(QDragMoveEvent* event) override;
-	void dropEvent(QDropEvent* event) override;
-};
-
 DroppableListWidget::DroppableListWidget(QWidget* parent) : QListWidget(parent) {
 	setAcceptDrops(true);
 }
@@ -129,9 +114,11 @@
 																			QDir::homePath(),
 																			QFileDialog::ShowDirsOnly
 																			| QFileDialog::DontResolveSymlinks);
-						if (dir.isEmpty())
+						const std::string s_dir = Strings::ToUtf8String(dir);
+						if (dir.isEmpty() || paths.count(s_dir))
 							return;
-						paths.insert(Strings::ToUtf8String(dir));
+
+						paths.insert(s_dir);
 						QListWidgetItem* item = new QListWidgetItem(listwidget);
 						item->setText(dir);
 					});
@@ -202,5 +189,3 @@
 	real_time_monitor = session.config.library.real_time_monitor;
 	AddTab(CreateFoldersWidget(), tr("Folder"));
 }
-
-#include "gui/dialog/settings/library.moc"