diff --git a/src/controllers/nft.controller.ts b/src/controllers/nft.controller.ts
index d8bc736..8d6f73d 100644
--- a/src/controllers/nft.controller.ts
+++ b/src/controllers/nft.controller.ts
@@ -172,6 +172,7 @@ class NftController extends BaseController {
       contract,
       chain: nftMap.get(contract).chain,
       holderNum: 1,
+      group: cfg.group,
       rewards: [chest.id],
     })
     await recordNew.save()
diff --git a/src/models/NFTHodlerRecord.ts b/src/models/NFTHodlerRecord.ts
index d52027e..cf942c3 100644
--- a/src/models/NFTHodlerRecord.ts
+++ b/src/models/NFTHodlerRecord.ts
@@ -8,6 +8,7 @@ import { BaseModule } from './Base'
 
 @dbconn()
 @index({ user: 1 }, { unique: false })
+@index({ user: 1, group: 1 }, { unique: false })
 @index({ user: 1, chain: 1, address: 1 }, { unique: true })
 @modelOptions({
   schemaOptions: { collection: 'nft_holder_claim_record', timestamps: true },