diff --git a/src/admin/settings/useSettings.js b/src/admin/settings/useSettings.js
index 6237d7e..2a5c040 100644
--- a/src/admin/settings/useSettings.js
+++ b/src/admin/settings/useSettings.js
@@ -32,7 +32,8 @@ export function useSettings() {
   const updatePrice = async (key, value) => {
     const { error } = await supabase
       .from('settings')
-      .upsert({ key, value: String(value), updated_at: new Date().toISOString() }, { onConflict: 'key' });
+      .update({ value: String(value), updated_at: new Date().toISOString() })
+      .eq('key', key);
 
     if (!error) {
       const thickness = parseInt(key.replace('price_', ''), 10);