diff --git a/backend/services/connection_service.go b/backend/services/connection_service.go
index 4cf7845..e283249 100644
--- a/backend/services/connection_service.go
+++ b/backend/services/connection_service.go
@@ -527,6 +527,7 @@ func (c *connectionService) GetKeyValue(connName string, db int, key string) (re
 }
 
 // SetKeyValue set value by key
+// @param ttl <= 0 means keep current ttl
 func (c *connectionService) SetKeyValue(connName string, db int, key, keyType string, value any, ttl int64) (resp types.JSResp) {
 	rdb, ctx, err := c.getRedisClient(connName, db)
 	if err != nil {
@@ -536,7 +537,9 @@ func (c *connectionService) SetKeyValue(connName string, db int, key, keyType st
 
 	var expiration time.Duration
 	if ttl < 0 {
-		expiration = redis.KeepTTL
+		if expiration, err = rdb.PTTL(ctx, key).Result(); err != nil {
+			expiration = redis.KeepTTL
+		}
 	} else {
 		expiration = time.Duration(ttl) * time.Second
 	}
@@ -546,7 +549,11 @@ func (c *connectionService) SetKeyValue(connName string, db int, key, keyType st
 			resp.Msg = "invalid string value"
 			return
 		} else {
-			_, err = rdb.Set(ctx, key, str, expiration).Result()
+			_, err = rdb.Set(ctx, key, str, 0).Result()
+			// set expiration lonely, not "keepttl"
+			if err == nil && expiration > 0 {
+				rdb.Expire(ctx, key, expiration)
+			}
 		}
 	case "list":
 		if strs, ok := value.([]any); !ok {
diff --git a/frontend/src/stores/connections.js b/frontend/src/stores/connections.js
index 9db3d5d..ba4acb1 100644
--- a/frontend/src/stores/connections.js
+++ b/frontend/src/stores/connections.js
@@ -533,8 +533,8 @@ const useConnectionStore = defineStore('connections', {
                         })
                         return
                     } else {
-                        // key not exists, remove this key
-                        await this.deleteKey(server, db, key)
+                        // its danger to delete "non-exists" key, just remove from tree view
+                        await this.deleteKey(server, db, key, true)
                     }
                 }
 
@@ -1327,21 +1327,23 @@ const useConnectionStore = defineStore('connections', {
          * @param {string} connName
          * @param {number} db
          * @param {string} key
+         * @param {boolean} [soft] do not try to remove from redis if true, just remove from tree data
          * @returns {Promise<boolean>}
          */
-        async deleteKey(connName, db, key) {
+        async deleteKey(connName, db, key, soft) {
             try {
-                const { data, success, msg } = await DeleteKey(connName, db, key)
-                if (success) {
-                    // update tree view data
-                    this._deleteKeyNode(connName, db, key)
-                    this._tidyNode(connName, db, key, true)
-
-                    // set tab content empty
-                    const tab = useTabStore()
-                    tab.emptyTab(connName)
-                    return true
+                if (soft !== true) {
+                    await DeleteKey(connName, db, key)
                 }
+
+                // update tree view data
+                this._deleteKeyNode(connName, db, key)
+                this._tidyNode(connName, db, key, true)
+
+                // set tab content empty
+                const tab = useTabStore()
+                tab.emptyTab(connName)
+                return true
             } finally {
             }
             return false