diff --git a/app/config_migration.py b/app/config_migration.py
index a1bb5f1..4dadda9 100644
--- a/app/config_migration.py
+++ b/app/config_migration.py
@@ -37,7 +37,10 @@ def migrate_configs_to_mysql():
                 skipped_count += 1
                 continue
 
-            value = store._load_json(key, DEFAULT_CONFIGS.get(key, {}))
+            value = store._load_json_from_file(key)
+            if value is None:
+                value = DEFAULT_CONFIGS.get(key, {})
+                logger.info(f"JSON 配置 [{key}] 不存在或损坏，使用默认值迁移")
             store._save_to_mysql(key, value)
             migrated_count += 1
             logger.info(f"配置 [{key}] 已从 JSON 迁移到 MySQL")
diff --git a/app/config_store.py b/app/config_store.py
index 30e92cf..db58a7e 100644
--- a/app/config_store.py
+++ b/app/config_store.py
@@ -86,7 +86,9 @@ class ConfigStore:
 
         if self.storage_manager.check_mysql():
             try:
-                self._save_to_mysql(key, value)
+                if not self._save_to_mysql(key, value):
+                    logger.warning(f"写入 MySQL 配置 [{key}] 失败，保留 JSON 旧值")
+                    return False
             except Exception as e:
                 logger.warning(f"写入 MySQL 配置 [{key}] 失败，保留 JSON 旧值: {e}")
                 return False