diff --git a/server/web3bcspider/services/erc721_refresher.js b/server/web3bcspider/services/erc721_refresher.js
index 64fa7c8..38b24b2 100644
--- a/server/web3bcspider/services/erc721_refresher.js
+++ b/server/web3bcspider/services/erc721_refresher.js
@@ -33,7 +33,7 @@ class Erc721Refresher extends BaseService {
       const {err, rows} = await dbpool.execBcEventConn(
         app,
         'execQuery',
-        ',SELECT * FROM t_erc721_refresh WHERE idx > ' + this.lastIdx.toString() + ' ' +
+        'SELECT * FROM t_erc721_refresh WHERE idx > ' + this.lastIdx.toString() + ' ' +
           'AND net_id = ? AND contract_address = ? AND status = 0 ' +
           'LIMIT ' + LIMIT_COUNT,
         [