diff --git a/plugins/addon/theme_configurator/model/ThemeConfigModel.php b/plugins/addon/theme_configurator/model/ThemeConfigModel.php
index b42f39f..883aeb2 100644
--- a/plugins/addon/theme_configurator/model/ThemeConfigModel.php
+++ b/plugins/addon/theme_configurator/model/ThemeConfigModel.php
@@ -51,7 +51,7 @@ class ThemeConfigModel
         */
         
         // 缓存未命中,从数据库读取
-        $row = $this->query()->order('id', 'asc')->find();
+        $row = $this->query()->order('id', 'desc')->find();
         error_log('ThemeConfigModel::getConfig() - 查询结果: ' . ($row ? 'found' : 'not found'));
         if ($row) {
             error_log('config字段长度: ' . strlen($row['config']));
@@ -87,12 +87,11 @@ class ThemeConfigModel
             'update_time' => time(),
         ];
 
-        $exists = $this->query()->find();
-        if ($exists) {
-            $this->query()->where('id', $exists['id'])->update($payload);
-        } else {
-            $this->query()->insert($payload);
-        }
+        // 删除所有旧记录,确保只有一条最新记录
+        $this->query()->delete();
+        
+        // 插入新记录
+        $this->query()->insert($payload);
 
         // 清除缓存,确保下次读取最新数据
         try {