diff --git a/Store/Internal/ComplexAutoSavedStore.cs b/Store/Internal/ComplexAutoSavedStore.cs
index 03bdfd1..57eeeec 100644
--- a/Store/Internal/ComplexAutoSavedStore.cs
+++ b/Store/Internal/ComplexAutoSavedStore.cs
@@ -79,7 +79,8 @@ namespace HermesSocketServer.Store.Internal
             ImmutableList<V>? list = null;
             lock (_lock)
             {
-                if (!keys.Any() || !values.Any()) {
+                if (!keys.Any() || !values.Any())
+                {
                     return;
                 }
 
diff --git a/Store/Internal/GroupSaveSqlGenerator.cs b/Store/Internal/GroupSaveSqlGenerator.cs
index 2676b36..4bde666 100644
--- a/Store/Internal/GroupSaveSqlGenerator.cs
+++ b/Store/Internal/GroupSaveSqlGenerator.cs
@@ -95,15 +95,14 @@ namespace HermesSocketServer.Store.Internal
 
             var ctp = columns.ToDictionary(c => c, c => _columnPropertyRelations[c]);
             var sb = new StringBuilder();
-            var columnsLower = columns.Select(c => c.ToLower());
             sb.Append($"INSERT INTO \"{table}\" (\"{string.Join("\", \"", columns)}\") VALUES ");
             for (var row = 0; row < rows; row++)
             {
                 sb.Append("(");
-                foreach (var column in columnsLower)
+                foreach (var column in columns)
                 {
                     sb.Append('@')
-                        .Append(column)
+                        .Append(column.ToLower())
                         .Append(row);
 
                     if (typeMapping.TryGetValue(column, out var type))