diff --git a/lib/middleware/cache.js b/lib/middleware/cache.js
index 45f65a8788..7b6e6b07ae 100644
--- a/lib/middleware/cache.js
+++ b/lib/middleware/cache.js
@@ -38,20 +38,16 @@ module.exports = function(app, options = {}) {
                 if (key && available) {
                     let value = await redisClient.get(key);
                     if (value) {
-                        await redisClient.expire(key, config.cache.contentExpire);
+                        redisClient.expire(key, config.cache.contentExpire);
                         value = value + '';
                     }
                     return value;
                 }
             },
-            set: async function(key, value, maxAge = config.cache.contentExpire) {
+            set: function(key, value, maxAge = config.cache.contentExpire) {
                 if (!available) {
                     return;
                 }
-                if (await redisClient.exists(key)) {
-                    logger.warn(`repeated key: ${key}, ${value}`);
-                    return;
-                }
                 if (!value || value === 'undefined') {
                     value = '';
                 }
@@ -59,7 +55,7 @@ module.exports = function(app, options = {}) {
                     value = JSON.stringify(value);
                 }
                 if (key) {
-                    await redisClient.setex(key, maxAge, value);
+                    redisClient.setex(key, maxAge, value);
                 }
             },
             client: redisClient,