diff --git a/src/synchronizations/game/synchronizer.rs b/src/synchronizations/game/synchronizer.rs
index 0ae9bc1..63beac1 100644
--- a/src/synchronizations/game/synchronizer.rs
+++ b/src/synchronizations/game/synchronizer.rs
@@ -80,6 +80,14 @@ impl Synchronizer {
         let res = self.game_api.list_games(req).await?;
 
         for g in res.games {
+          match upsert_games.iter().find(|v| v.id.eq(&g.id)) {
+            Some(d) => {
+              println!("id is duplicated. e: {:?}, n: {:?}", d, g);
+              continue;
+            }
+            None => {}
+          };
+
           upsert_games.push(repositories::game::models::UpsertGame {
             id: g.id,
             vendor_id: v.id,