diff --git a/.gitignore b/.gitignore
index f7725c5..5a64751 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .env
 __pycache__
-uploads/*
\ No newline at end of file
+uploads/*
+logs
\ No newline at end of file
diff --git a/main.py b/main.py
index 5491aab..077b99d 100644
--- a/main.py
+++ b/main.py
@@ -101,6 +101,7 @@ async def update_nav(data: list[dict]):
     query = f"""
         INSERT INTO nav_history ({', '.join(columns)})
         VALUES %s
+        on conflict(amfi_code, date) do update set nav=excluded.nav
     """
 
     values = [