diff --git a/src/controllers/nft.controller.ts b/src/controllers/nft.controller.ts
index 31ea429..f2c4c31 100644
--- a/src/controllers/nft.controller.ts
+++ b/src/controllers/nft.controller.ts
@@ -176,7 +176,7 @@ class NftController extends BaseController {
     let recordNew = new NFTHolderRecord({
       user: user.id,
       contract,
-      chain: nftMap.get(contract).chain,
+      chain: 1,
       holderNum: 1,
       group: cfg.group,
       rewards: [chest.id],
diff --git a/src/models/NFTHodlerRecord.ts b/src/models/NFTHodlerRecord.ts
index cf942c3..7103197 100644
--- a/src/models/NFTHodlerRecord.ts
+++ b/src/models/NFTHodlerRecord.ts
@@ -9,7 +9,7 @@ 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 })
+@index({ user: 1, contract: 1 }, { unique: true })
 @modelOptions({
   schemaOptions: { collection: 'nft_holder_claim_record', timestamps: true },
   options: { allowMixed: Severity.ALLOW },