diff --git a/src-tauri/src/plugins/supabase.rs b/src-tauri/src/plugins/supabase.rs
index 9ab8a01..e0fea7e 100644
--- a/src-tauri/src/plugins/supabase.rs
+++ b/src-tauri/src/plugins/supabase.rs
@@ -142,7 +142,7 @@ impl SupabaseClient {
             "frango": estado.get("frango").and_then(|v| v.as_i64()).unwrap_or(0),
         });
 
-        // Upsert via POST com Prefer: resolution=merge-duplicates
+        // Primeiro tenta INSERT (upsert via Prefer)
         let resp = self
             .http
             .post(&format!("{}/rest/v1/fechamentos_web", self.base_url))
@@ -152,7 +152,7 @@ impl SupabaseClient {
             .send()?;
 
         let status = resp.status();
-        if status.is_success() {
+        if status.is_success() || status.as_u16() == 409 {
             Ok(serde_json::json!({ "ok": true, "id_fechamento": id_fechamento }))
         } else {
             let body = resp.text().unwrap_or_default();