fix ger code

@@ -328,10 +328,14 @@ module.exports = class extends global.yoho.BaseModel {
         const info = await mysqlCli.query(`select id from ${TABLE_ACT_PRIZE_PRODUCT_USER}
             where prize_code = :prizeCode limit 1`, {prizeCode});
 
-        if (info && info.length && !isRetry) {
-            return this.createPrizeCode(length, true);
+        if (info && info.length) {
+            if (isRetry) {
+                return '';
+            } else {
+                return this.createPrizeCode(length, true);
+            }
         } else {
-            return '';
+            return prizeCode;
         }
     }