diff --git a/src/background/store.js b/src/background/store.js
index 691fb53..3ea0187 100644
--- a/src/background/store.js
+++ b/src/background/store.js
@@ -3,7 +3,7 @@ const objectHash = require('object-hash');
 module.exports = class P2PStore {
     constructor(p2p, sphinx)
     {
-        this.id = 1
+        this.id = 0
 
         console.log('connect p2p store...')
         this.p2p = p2p
@@ -14,7 +14,7 @@ module.exports = class P2PStore {
 				return
 
 			if(rows[0] && rows[0].mx >= 1)
-                this.id = rows[0].mx + 1;
+                this.id = rows[0].mx;
                 
             console.log('store db index', this.id)
 
@@ -27,34 +27,18 @@ module.exports = class P2PStore {
             }, 10000)
 		})
 
-        this.p2p.on('dbStore', (record, callback) => {
-            if(!record)
-                return
-            
-            if(typeof record !== 'object')
-                return
-
-            if(!record.id)
-                return
-            
-            if(record.id <= this.id)
-                return
-
-            // store
-            console.log('store record', record.id)
-            this._pushToDb(record)
-        })
+        this.p2p.on('dbStore', (record) => this._syncRecord(record))
 
         this.p2p.on('dbSync', ({id} = {}, callback) => {
             console.log('ask to sync db from', id, 'version')
-            if(!id || this.id <= id)
+            if(typeof id === 'undefined' || id >= this.id)
             {
                 callback(false)
                 return
             }
 
             // back 
-            this.sphinx.query(`select * from store where id >= ${id}`, (err, records) => {
+            this.sphinx.query(`select * from store where id > ${id}`, (err, records) => {
                 if(err)
                 {
                     console.log(err)
@@ -74,29 +58,36 @@ module.exports = class P2PStore {
             if(!data || !data.records)
                 return
 
-            for(const record of data.records)
-            {
-                if(!record.id)
-                    return
-
-                if(record.id < this.id)
-                    return
-                    
-                record.data = JSON.parse(record.data)
-                    
-                // check hash
-                if(objectHash(record.data) !== record.hash)
-                {
-            	    console.log('wrong hash for sync peerdb')
-            	    return
-            	}
-
-                // push to db
-                this._pushToDb(record)
-            }
+            data.records.forEach(record => this._syncRecord(record))
         })
     }
 
+    _syncRecord(record)
+    {
+        if(!record)
+            return
+
+        if(!record.id)
+            return
+
+        if(record.id <= this.id)
+            return
+            
+        if(typeof record.data !== 'object')
+            record.data = JSON.parse(record.data)
+            
+        // check hash
+        if(objectHash(record.data) !== record.hash)
+        {
+            console.log('wrong hash for sync peerdb')
+            return
+        }
+
+        // push to db
+        console.log('sync peerdb record', record.id)
+        this._pushToDb(record)
+    }
+
     _pushToDb(value, callback)
     {
         const data = this.sphinx.escape(JSON.stringify(value.data))
@@ -118,7 +109,7 @@ module.exports = class P2PStore {
     store(obj)
     {
         const value = {
-            id: this.id++,
+            id: ++this.id,
             hash: objectHash(obj),
             data: obj,
             index: obj._index,