diff --git a/lang/en.json b/lang/en.json
index 7c5fa20..2d49c90 100644
--- a/lang/en.json
+++ b/lang/en.json
@@ -1584,6 +1584,7 @@
     "Payment Amount": "Payment Amount",
     "Payment Buffer Seconds": "Payment Buffer Seconds",
     "Payment Config": "Payment Config",
+    "No payment config is selected (Not Used). Save this machine without any payment config?": "No payment config is selected (Not Used). Save this machine without any payment config?",
     "Payment Configuration": "Payment Configuration",
     "Payment Configuration created successfully.": "Payment Configuration created successfully.",
     "Payment Configuration deleted successfully.": "Payment Configuration deleted successfully.",
diff --git a/lang/zh_TW.json b/lang/zh_TW.json
index df7ed1f..806adcb 100644
--- a/lang/zh_TW.json
+++ b/lang/zh_TW.json
@@ -1585,6 +1585,7 @@
     "Payment Amount": "支付金額",
     "Payment Buffer Seconds": "金流緩衝時間(s)",
     "Payment Config": "金流配置",
+    "No payment config is selected (Not Used). Save this machine without any payment config?": "尚未選擇金流配置（目前為「不使用」）。確定要在沒有金流配置的情況下儲存嗎？",
     "Payment Configuration": "客戶金流設定",
     "Payment Configuration created successfully.": "金流設定已成功建立。",
     "Payment Configuration deleted successfully.": "金流設定已成功刪除。",
diff --git a/resources/views/admin/basic-settings/machines/edit.blade.php b/resources/views/admin/basic-settings/machines/edit.blade.php
index 48de703..2fe52f2 100644
--- a/resources/views/admin/basic-settings/machines/edit.blade.php
+++ b/resources/views/admin/basic-settings/machines/edit.blade.php
@@ -75,6 +75,11 @@
                 }));
                 return;
             }
+            if (!this.$el.payment_config_id.value.trim()) {
+                if (!confirm('{{ __("No payment config is selected (Not Used). Save this machine without any payment config?") }}')) {
+                    return;
+                }
+            }
             this.$el.submit();
         }
     }" @submit.prevent="submitForm" action="{{ route('admin.basic-settings.machines.update', $machine) }}" method="POST" enctype="multipart/form-data" class="space-y-6">