diff --git a/src/repositories/betting_history/repository.rs b/src/repositories/betting_history/repository.rs
index e6aba62..3049940 100644
--- a/src/repositories/betting_history/repository.rs
+++ b/src/repositories/betting_history/repository.rs
@@ -46,8 +46,12 @@ impl Repository {
     conn: &diesel::PgConnection,
     new_betting_history: &Vec<models::NewBettingHistory>,
   ) -> Result<(), Error> {
+    use api_kgon_betting_history::dsl;
+
     diesel::insert_into(api_kgon_betting_history::table)
       .values(new_betting_history)
+      .on_conflict(dsl::id)
+      .do_nothing()
       .execute(conn)?;
 
     Ok(())