diff --git a/apps/server/src/migration-runner.ts b/apps/server/src/migration-runner.ts
index b37c94c..e0ff8d7 100644
--- a/apps/server/src/migration-runner.ts
+++ b/apps/server/src/migration-runner.ts
@@ -7,14 +7,17 @@ config();
 const isMySQL = (process.env.DB_TYPE || 'sqlite') === 'mysql';
 
 export async function runMigrationsOnStartup(): Promise<void> {
+  // 该迁移由 MySQL 生成；SQLite 开发环境由 AppModule 中的 TypeORM synchronize 建表。
+  if (!isMySQL) return;
+
   const ds = new DataSource({
-    type: isMySQL ? 'mysql' : 'better-sqlite3',
-    host: isMySQL ? (process.env.DB_HOST || 'localhost') : undefined,
-    port: isMySQL ? Number(process.env.DB_PORT || 3306) : undefined,
-    username: isMySQL ? (process.env.DB_USERNAME || 'root') : undefined,
-    password: isMySQL ? (process.env.DB_PASSWORD || '') : undefined,
-    database: process.env.DB_DATABASE || (isMySQL ? 'dorm_billing' : 'dorm_billing.db'),
-    charset: isMySQL ? 'utf8mb4' : undefined,
+    type: 'mysql',
+    host: process.env.DB_HOST || 'localhost',
+    port: Number(process.env.DB_PORT || 3306),
+    username: process.env.DB_USERNAME || 'root',
+    password: process.env.DB_PASSWORD || '',
+    database: process.env.DB_DATABASE || 'dorm_billing',
+    charset: 'utf8mb4',
     migrations: [InitialSchema1784520727860],
   });