diff --git a/PKHeX.Core/Util/ReflectUtil.cs b/PKHeX.Core/Util/ReflectUtil.cs
index 2731abc58..e701e912e 100644
--- a/PKHeX.Core/Util/ReflectUtil.cs
+++ b/PKHeX.Core/Util/ReflectUtil.cs
@@ -111,7 +111,7 @@ public static IEnumerable<string> GetPropertiesCanWritePublicDeclared(Type type)
         if (type.IsEnum)
         {
             var str = value.ToString() ?? string.Empty;
-            if (int.TryParse(str, out var integer))
+            if (Enum.IsDefined(type, str) && int.TryParse(str, out var integer))
                 return Convert.ChangeType(integer, type);
             return Enum.Parse(type, str, true);
         }