1 files changed, 11 insertions, 0 deletions
diff --git a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp
index d4c37cb9..c1898dd9 100644
--- a/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp
+++ b/launcher/modplatform/modrinth/ModrinthInstanceCreationTask.cpp
@@ -135,6 +135,17 @@ bool ModrinthCreationTask::updateInstance()
             qDebug() << "Scheduling" << entry << "for removal";
             m_files_to_remove.append(old_minecraft_dir.absoluteFilePath(entry));
         }
+    } else {
+        // We don't have an old index file, so we may duplicate stuff!
+        auto dialog = CustomMessageBox::selectable(m_parent,
+                tr("No index file."),
+                tr("We couldn't find a suitable index file for the older version. This may cause some of the files to be duplicated. Do you want to continue?"),
+                QMessageBox::Warning, QMessageBox::Ok | QMessageBox::Cancel);
+
+        if (dialog->exec() == QDialog::DialogCode::Rejected) {
+            m_abort = true;
+            return false;
+        }
     }