diff --git a/lib/ui/settings/import_export.dart b/lib/ui/settings/import_export.dart
index c131ddcf9..45859c258 100644
--- a/lib/ui/settings/import_export.dart
+++ b/lib/ui/settings/import_export.dart
@@ -454,7 +454,7 @@ class _FieldMapper extends StatelessWidget {
           items: [
             DropdownMenuItem<String>(
               child: SizedBox(),
-              value: null,
+              value: '',
             ),
             ...sorted
                 .map(