diff --git a/initdatas/activity_info.json b/initdatas/activity_info.json
index f5d2336..496bad4 100644
--- a/initdatas/activity_info.json
+++ b/initdatas/activity_info.json
@@ -51,7 +51,7 @@
     },{
       "id": "e2far3lj30vwcpe0mf8",
       "task": "DiscordJoin",
-      "title": "Join Discord",
+      "title": "Join Counter Fire Discord",
       "type": 1,
       "desc": "Join Counter Fire’s official Discord server",
       "category": "Social Tasks",
@@ -66,7 +66,7 @@
     }, {
       "id": "e2fuah0j30vwcpe0my7",
       "task": "TwitterRetweet",
-      "title": "Retweet on X",
+      "title": "Retweet a tweet",
       "type": 1,
       "desc": "Retweet specific tweets",
       "category": "Social Tasks",
@@ -81,7 +81,7 @@
     }, {
       "id": "e2fuah0j30vwcpe0my9",
       "task": "TwitterLike",
-      "title": "Like the tweets on X",
+      "title": "Like a tweet",
       "type": 1,
       "desc": "Like specific tweets",
       "category": "Social Tasks",
diff --git a/package.json b/package.json
index 19902a5..c114ba2 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "fastify-xml-body-parser": "^2.2.0",
     "mongodb-extended-json": "^1.11.1",
     "mongoose": "8.2.3",
-    "nanoid": "^5.0.7",
+    "nanoid": "^3.1.23",
     "node-schedule": "^2.0.0",
     "siwe": "^2.1.4",
     "tracer": "^1.1.6",
diff --git a/src/controllers/voucher.controller.ts b/src/controllers/voucher.controller.ts
index 4cf12c4..f6c2d9b 100644
--- a/src/controllers/voucher.controller.ts
+++ b/src/controllers/voucher.controller.ts
@@ -1,9 +1,9 @@
-import { isValidShareCode, isValidVoucherCode } from 'common/Utils'
+import { isValidVoucherCode } from 'common/Utils'
 import logger from 'logger/logger'
 import { ChestStatusEnum } from 'models/ActivityChest'
 import { SourceEnum, VoucherRecord, VoucherStatusEnum } from 'models/VoucherRecord'
 import { generateNewChest } from 'services/game.svr'
-import { SyncLocker, BaseController, router, role, ROLE_ANON, ZError } from 'zutils'
+import { SyncLocker, BaseController, router, ZError } from 'zutils'
 import { customAlphabet } from 'nanoid'
 import { BASE52_ALPHABET } from 'common/Constants'
 /**
@@ -13,7 +13,7 @@ class VoucherController extends BaseController {
   @router('post /api/voucher/generate')
   async generateTestVoucher(req) {
     logger.db('generate_test_voucher', req)
-    if (process.env.NODE_ENV !== 'development') {
+    if (process.env.NODE_ENV === 'production') {
       throw new ZError(10, 'only support in development')
     }
     const user = req.user
@@ -25,6 +25,12 @@ class VoucherController extends BaseController {
     const nanoid = customAlphabet(BASE52_ALPHABET, 8)
     for (let i = 0; i < num; i++) {
       let code = 'test' + nanoid()
+      // check if code exists
+      let record = await VoucherRecord.findOne({ code })
+      if (record) {
+        i--
+        continue
+      }
       let voucher = new VoucherRecord({
         batch: 'test',
         code,
@@ -38,7 +44,7 @@ class VoucherController extends BaseController {
         creator: user.id,
       })
       await voucher.save()
-      results.push(voucher.id)
+      results.push(voucher.code)
     }
     return results
   }
diff --git a/src/models/VoucherRecord.ts b/src/models/VoucherRecord.ts
index 5d93d3b..af89cba 100644
--- a/src/models/VoucherRecord.ts
+++ b/src/models/VoucherRecord.ts
@@ -23,12 +23,12 @@ export enum SourceEnum {
 @index({ user: 1, activity: 1 }, { unique: false })
 @index({ code: 1, activity: 1 }, { unique: true })
 @modelOptions({
-  schemaOptions: { collection: 'activity_box', timestamps: true },
+  schemaOptions: { collection: 'voucher_record', timestamps: true },
   options: { allowMixed: Severity.ALLOW },
 })
 export class VoucherRecordClass extends BaseModule {
   @prop()
-  public batch: number
+  public batch: string
   @prop()
   public code: string
   // 0 锁定, 1 未发放 2 已发放,待使用 9 已兑换
diff --git a/yarn.lock b/yarn.lock
index b4f3f51..a98f07f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3317,10 +3317,10 @@ nano-json-stream-parser@^0.1.2:
   resolved "https://registry.npmjs.org/nano-json-stream-parser/-/nano-json-stream-parser-0.1.2.tgz"
   integrity sha512-9MqxMH/BSJC7dnLsEMPyfN5Dvoo49IsPFYMcHw3Bcfc2kN0lpHRBSzlMSVx4HGyJ7s9B31CyBTVehWJoQ8Ctew==
 
-nanoid@^5.0.7:
-  version "5.0.7"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-5.0.7.tgz#6452e8c5a816861fd9d2b898399f7e5fd6944cc6"
-  integrity sha512-oLxFY2gd2IqnjcYyOXD8XGCftpGtZP2AbHbOkthDkvRywH5ayNtPVy9YlOPcHckXzbLTCHpkb7FB+yuxKV13pQ==
+nanoid@^3.1.23:
+  version "3.3.7"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.7.tgz#d0c301a691bc8d54efa0a2226ccf3fe2fd656bd8"
+  integrity sha512-eSRppjcPIatRIMC1U6UngP8XFcz8MQWGQdt1MTBQ7NaAmvXDfvNxbvWV3x2y6CdEUciCSsDHDQZbhYaB8QEo2g==
 
 natural-compare@^1.4.0:
   version "1.4.0"