diff --git a/app/Services/SyncService.php b/app/Services/SyncService.php
index e1ce46b..afc0056 100644
--- a/app/Services/SyncService.php
+++ b/app/Services/SyncService.php
@@ -52,7 +52,7 @@ public function sync(): array
         $baseUrl = "http://{$this->peerIp}:{$this->peerPort}";
 
         $peerCursor  = (int) \App\Models\OsurgInitial::val('sync_peer_cursor', 0);
-        $ourLastSync = SyncLog::lastSyncId();
+        $ourLastSync = (int) \App\Models\OsurgInitial::val('our_sync_cursor', 0);
 
         try {
             $pullResponse = Http::timeout(30)
@@ -103,6 +103,11 @@ public function sync(): array
                 }
                 $report[] = count($ourChanges) . ' تغییر به سیستم مقابل ارسال شد.';
 
+                if (! empty($ourChanges)) {
+                    $maxOurId = max(array_column($ourChanges, 'id'));
+                    $this->saveOurCursor($maxOurId);
+                }
+
                 if ($this->isFtpConfigured()) {
                     $this->transferFilesViaFtp($ourChanges, 'c2s', $report);
                 } else {
@@ -426,6 +431,15 @@ private function applyChange(array $change, string $prefix, array &$report): voi
         }
     }
 
+    private function saveOurCursor(int $cursor): void
+    {
+        \App\Models\OsurgInitial::updateOrCreate(
+            ['init_parameter' => 'our_sync_cursor'],
+            ['init_value'     => $cursor],
+        );
+        cache()->forget('osurg_initial.our_sync_cursor');
+    }
+
     private function savePeerCursor(int $cursor): void
     {
         \App\Models\OsurgInitial::updateOrCreate(