diff --git a/backend/services/connection_service.go b/backend/services/connection_service.go
index 217d728..2b07e5e 100644
--- a/backend/services/connection_service.go
+++ b/backend/services/connection_service.go
@@ -9,15 +9,16 @@ import (
 	"golang.org/x/crypto/ssh"
 	"net"
 	"os"
-	"slices"
 	"strconv"
 	"strings"
 	"sync"
 	"time"
 	. "tinyrdm/backend/storage"
 	"tinyrdm/backend/types"
+	"tinyrdm/backend/utils/coll"
 	maputil "tinyrdm/backend/utils/map"
 	redis2 "tinyrdm/backend/utils/redis"
+	sliceutil "tinyrdm/backend/utils/slice"
 	strutil "tinyrdm/backend/utils/string"
 )
 
@@ -352,24 +353,28 @@ func (c *connectionService) OpenConnection(name string) (resp types.JSResp) {
 			dbInfo := c.parseDBItemInfo(dbInfoStr)
 			return types.ConnectionDB{
 				Name:    dbName,
+				Index:   idx,
 				Keys:    dbInfo["keys"],
 				Expires: dbInfo["expires"],
 				AvgTTL:  dbInfo["avg_ttl"],
 			}
 		} else {
 			return types.ConnectionDB{
-				Name: dbName,
+				Name:  dbName,
+				Index: idx,
 			}
 		}
 	}
 	switch selConn.DBFilterType {
 	case "show":
-		for _, idx := range selConn.DBFilterList {
+		filterList := sliceutil.Unique(selConn.DBFilterList)
+		for _, idx := range filterList {
 			dbs = append(dbs, queryDB(idx))
 		}
 	case "hide":
+		hiddenList := coll.NewSet(selConn.DBFilterList...)
 		for idx := 0; idx < totaldb; idx++ {
-			if !slices.Contains(selConn.DBFilterList, idx) {
+			if !hiddenList.Contains(idx) {
 				dbs = append(dbs, queryDB(idx))
 			}
 		}
diff --git a/backend/types/connection.go b/backend/types/connection.go
index 8333f0b..2535bd0 100644
--- a/backend/types/connection.go
+++ b/backend/types/connection.go
@@ -35,6 +35,7 @@ type ConnectionGroup struct {
 
 type ConnectionDB struct {
 	Name    string `json:"name"`
+	Index   int    `json:"index"`
 	Keys    int    `json:"keys"`
 	Expires int    `json:"expires,omitempty"`
 	AvgTTL  int    `json:"avgTtl,omitempty"`
diff --git a/backend/utils/string/convert.go b/backend/utils/string/convert.go
index a3bf361..aafa176 100644
--- a/backend/utils/string/convert.go
+++ b/backend/utils/string/convert.go
@@ -178,11 +178,11 @@ func decodeBinary(str string) (string, bool) {
 }
 
 func decodeHex(str string) (string, bool) {
-	encodeStr := hex.EncodeToString([]byte(str))
+	decodeStr := hex.EncodeToString([]byte(str))
 	var resultStr strings.Builder
-	for i := 0; i < len(encodeStr); i += 2 {
+	for i := 0; i < len(decodeStr); i += 2 {
 		resultStr.WriteString("\\x")
-		resultStr.WriteString(encodeStr[i : i+2])
+		resultStr.WriteString(decodeStr[i : i+2])
 	}
 	return resultStr.String(), true
 }
diff --git a/frontend/src/components/dialogs/ConnectionDialog.vue b/frontend/src/components/dialogs/ConnectionDialog.vue
index 7f4ccac..165a4bd 100644
--- a/frontend/src/components/dialogs/ConnectionDialog.vue
+++ b/frontend/src/components/dialogs/ConnectionDialog.vue
@@ -460,7 +460,7 @@ const onClose = () => {
                         :disabled="!generalForm.sentinel.enable"
                         label-placement="top">
                         <n-form-item :label="$t('dialogue.connection.sentinel.master')">
-                            <n-space>
+                            <n-input-group>
                                 <n-select
                                     v-model:value="generalForm.sentinel.master"
                                     filterable
@@ -469,7 +469,7 @@ const onClose = () => {
                                 <n-button :loading="loadingSentinelMaster" @click="onLoadSentinelMasters">
                                     {{ $t('dialogue.connection.sentinel.auto_discover') }}
                                 </n-button>
-                            </n-space>
+                            </n-input-group>
                         </n-form-item>
                         <n-form-item :label="$t('dialogue.connection.sentinel.password')">
                             <n-input
diff --git a/frontend/src/stores/connections.js b/frontend/src/stores/connections.js
index b478113..d591356 100644
--- a/frontend/src/stores/connections.js
+++ b/frontend/src/stores/connections.js
@@ -1,5 +1,19 @@
 import { defineStore } from 'pinia'
-import { endsWith, get, isEmpty, join, remove, size, slice, sortedIndexBy, split, sumBy, toUpper, uniq } from 'lodash'
+import {
+    endsWith,
+    find,
+    get,
+    isEmpty,
+    join,
+    remove,
+    size,
+    slice,
+    sortedIndexBy,
+    split,
+    sumBy,
+    toUpper,
+    uniq,
+} from 'lodash'
 import {
     AddHashField,
     AddListItem,
@@ -271,6 +285,23 @@ const useConnectionStore = defineStore('connections', {
             return null
         },
 
+        /**
+         * get database by server name and index
+         * @param {string} connName
+         * @param {number} db
+         * @return {{}|null}
+         */
+        getDatabase(connName, db) {
+            const dbs = this.databases[connName]
+            if (dbs != null) {
+                const selDB = find(dbs, (item) => item.db === db)
+                if (selDB != null) {
+                    return selDB
+                }
+            }
+            return null
+        },
+
         /**
          * create a new connection or update current connection profile
          * @param {string} name set null if create a new connection
@@ -362,7 +393,7 @@ const useConnectionStore = defineStore('connections', {
                     label: db[i].name,
                     name: name,
                     keys: db[i].keys,
-                    db: i,
+                    db: db[i].index,
                     type: ConnectionType.RedisDB,
                     isLeaf: false,
                     children: undefined,
@@ -490,10 +521,14 @@ const useConnectionStore = defineStore('connections', {
                 throw new Error(msg)
             }
             const { keys = [] } = data
-            const dbs = this.databases[connName]
-            dbs[db].opened = true
+            const selDB = this.getDatabase(connName, db)
+            if (selDB == null) {
+                return
+            }
+
+            selDB.opened = true
             if (isEmpty(keys)) {
-                dbs[db].children = []
+                selDB.children = []
                 return
             }
 
@@ -509,9 +544,12 @@ const useConnectionStore = defineStore('connections', {
          * @returns {Promise<void>}
          */
         async reopenDatabase(connName, db) {
-            const dbs = this.databases[connName]
-            dbs[db].children = undefined
-            dbs[db].isLeaf = false
+            const selDB = this.getDatabase(connName, db)
+            if (selDB == null) {
+                return
+            }
+            selDB.children = undefined
+            selDB.isLeaf = false
 
             this._getNodeMap(connName, db).clear()
         },
@@ -522,10 +560,13 @@ const useConnectionStore = defineStore('connections', {
          * @param db
          */
         closeDatabase(connName, db) {
-            const dbs = this.databases[connName]
-            delete dbs[db].children
-            dbs[db].isLeaf = false
-            dbs[db].opened = false
+            const selDB = this.getDatabase(connName, db)
+            if (selDB == null) {
+                return
+            }
+            delete selDB.children
+            selDB.isLeaf = false
+            selDB.opened = false
 
             this._getNodeMap(connName, db).clear()
         },
@@ -683,12 +724,16 @@ const useConnectionStore = defineStore('connections', {
                 return result
             }
             const separator = this._getSeparator(connName)
-            const dbs = this.databases[connName]
-            if (dbs[db].children == null) {
-                dbs[db].children = []
+            const selDB = this.getDatabase(connName, db)
+            if (selDB == null) {
+                return result
+            }
+
+            if (selDB.children == null) {
+                selDB.children = []
             }
             const nodeMap = this._getNodeMap(connName, db)
-            const rootChildren = dbs[db].children
+            const rootChildren = selDB.children
             for (const key of keys) {
                 const keyParts = split(key, separator)
                 const len = size(keyParts)
@@ -782,7 +827,7 @@ const useConnectionStore = defineStore('connections', {
          */
         _tidyNode(connName, db, key, skipResort) {
             const nodeMap = this._getNodeMap(connName, db)
-            const dbNode = get(this.databases, [connName, db], {})
+            const dbNode = this.getDatabase(connName, db) || {}
             const separator = this._getSeparator(connName)
             const keyParts = split(key, separator)
             const totalParts = size(keyParts)
@@ -873,7 +918,7 @@ const useConnectionStore = defineStore('connections', {
                 const nodeMap = this._getNodeMap(server, db)
                 return nodeMap.get(keyPart)
             } else {
-                return this.databases[server][db]
+                return this.getDatabase(server, db)
             }
         },
 
@@ -1291,7 +1336,7 @@ const useConnectionStore = defineStore('connections', {
          * @private
          */
         _deleteKeyNode(connName, db, key, isLayer) {
-            const dbRoot = get(this.databases, [connName, db], {})
+            const dbRoot = this.getDatabase(connName, db) || {}
             const separator = this._getSeparator(connName)
 
             if (dbRoot == null) {