diff --git a/app/lib/entity/pref/provider/memory.dart b/app/lib/entity/pref/provider/memory.dart
index aff1fad7..c45c8ed4 100644
--- a/app/lib/entity/pref/provider/memory.dart
+++ b/app/lib/entity/pref/provider/memory.dart
@@ -33,7 +33,7 @@ class PrefMemoryProvider extends PrefProvider {
 
   @override
   Future<bool> remove(PrefKeyInterface key) async {
-    _data.remove(key);
+    _data.remove(key.toStringKey());
     return true;
   }