diff --git a/server/api/auth/register.post.ts b/server/api/auth/register.post.ts
index 7f86f1a..4d420a6 100644
--- a/server/api/auth/register.post.ts
+++ b/server/api/auth/register.post.ts
@@ -2,8 +2,10 @@ import { registerSchema } from '../../utils/auth/validation'
 import { verifyCaptcha } from '../../utils/auth/captcha'
 import { dbGlobal } from 'drizzle-pkg/lib/db'
 import { users } from 'drizzle-pkg/lib/schema/auth'
-
 import { hash } from 'bcryptjs'
+import log4js from 'logger'
+
+const logger = log4js.getLogger('AUTH')
 
 export default defineWrappedResponseHandler(async (event) => {
   const body = await readBody(event)
@@ -33,7 +35,12 @@ export default defineWrappedResponseHandler(async (event) => {
       .returning({ id: users.id })
 
     return R.success({ id: result[0].id, username })
-  } catch {
-    return R.error('用户名已存在', null)
+  } catch (err: any) {
+    const msg = String(err?.message ?? '')
+    if (msg.toLowerCase().includes('unique') || msg.includes('SQLITE_CONSTRAINT')) {
+      return R.error('用户名已存在', null)
+    }
+    logger.error('Failed to insert user', msg)
+    return R.error('注册失败，请稍后重试', null)
   }
 })