try to fix duplicated cart items

functions.php

@@ -209,3 +209,21 @@ function bbloomer_order_completed_email_add_cc_bcc($headers, $email_id, $order)
   }
   return $headers;
 }
+
+/**
+ * Force empty cart before adding new items
+ * Prevents users from having multiple products in cart at once
+ */
+function force_single_item_cart($passed, $product_id, $quantity) {
+  // If cart is not empty and we're adding a new product
+  if (!WC()->cart->is_empty()) {
+    // Show notice to the user
+    // wc_add_notice(__('Your cart has been emptied to add this new item. Only one product can be purchased at a time.', 'somos-infinitos-theme'), 'notice');
+    
+    // Empty the cart
+    WC()->cart->empty_cart();
+  }
+  
+  return $passed;
+}
+add_filter('woocommerce_add_to_cart_validation', 'force_single_item_cart', 10, 3);