diff --git a/src/pages/gpu-service/instances/components/instance-type-cell.tsx b/src/pages/gpu-service/instances/components/instance-type-cell.tsx
index 135a63f5..cc7dd231 100644
--- a/src/pages/gpu-service/instances/components/instance-type-cell.tsx
+++ b/src/pages/gpu-service/instances/components/instance-type-cell.tsx
@@ -24,7 +24,6 @@ const InstanceTypeCell: React.FC<{
 }> = ({ title, name, sections }) => {
   const specInfo = (
     <div style={{ minWidth: 200 }}>
-      {name && <div style={{ fontWeight: 600, marginBottom: 8 }}>{name}</div>}
       {sections.map((sec) => {
         const rows = sec.rows.filter(([, v]) => v && v !== '-');
         if (!rows.length) return null;
diff --git a/src/pages/gpu-service/instances/config/index.ts b/src/pages/gpu-service/instances/config/index.ts
index 5c76182d..de968623 100644
--- a/src/pages/gpu-service/instances/config/index.ts
+++ b/src/pages/gpu-service/instances/config/index.ts
@@ -153,11 +153,7 @@ export const rowActionList: InstanceRowAction[] = [
     icon: icons.DeleteOutlined,
     show: (record: ListItem) => {
       const phase = record.status?.phase;
-      return [
-        ...GPUStackFailedStatuses,
-        InstanceStatusValueMap.Ready,
-        InstanceStatusValueMap.Unknown
-      ].includes(phase as string);
+      return true;
     },
     props: {
       danger: true
diff --git a/src/pages/llmodels/components/deployment/deploy-builtin-modal.tsx b/src/pages/llmodels/components/deployment/deploy-builtin-modal.tsx
index 9349a525..575bc215 100644
--- a/src/pages/llmodels/components/deployment/deploy-builtin-modal.tsx
+++ b/src/pages/llmodels/components/deployment/deploy-builtin-modal.tsx
@@ -8,7 +8,11 @@ import _ from 'lodash';
 import React, { useEffect, useMemo, useRef, useState } from 'react';
 import styled from 'styled-components';
 import { queryCatalogItemSpec } from '../../apis';
-import { DeployFormKeyMap, sourceOptions } from '../../config';
+import {
+  DeployFormKeyMap,
+  mergeBackendParameters,
+  sourceOptions
+} from '../../config';
 import { CatalogFormContext } from '../../config/form-context';
 import {
   CatalogSpec,
@@ -280,10 +284,10 @@ const AddModal: React.FC<AddModalProps> = (props) => {
       setSourceList(sources);
       initFormDataBySource({
         ...defaultSpec,
-        backend_parameters: [
-          ...defaultBackendParams,
-          ...(defaultSpec.backend_parameters || [])
-        ],
+        backend_parameters: mergeBackendParameters(
+          defaultBackendParams,
+          defaultSpec.backend_parameters || []
+        ),
         cluster_id: clusterId
       });
 
diff --git a/src/pages/llmodels/components/deployment/deploy-modal.tsx b/src/pages/llmodels/components/deployment/deploy-modal.tsx
index 820ee692..aebd9804 100644
--- a/src/pages/llmodels/components/deployment/deploy-modal.tsx
+++ b/src/pages/llmodels/components/deployment/deploy-modal.tsx
@@ -13,6 +13,7 @@ import ColumnWrapper from '../../../_components/column-wrapper';
 import {
   defaultFormValues,
   DeployFormKeyMap,
+  mergeBackendParameters,
   modelSourceMap
 } from '../../config';
 import { FormData, SourceType } from '../../config/types';
@@ -406,10 +407,10 @@ const AddModal: FC<AddModalProps> = (props) => {
           ...modelInfo.env,
           ...defaultSpec.env
         },
-        backend_parameters: [
-          ...modelInfo.backend_parameters,
-          ...(defaultSpec.backend_parameters || [])
-        ],
+        backend_parameters: mergeBackendParameters(
+          modelInfo.backend_parameters,
+          defaultSpec.backend_parameters
+        ),
         name: generateNameValue(item, modelInfo.name, manual),
         categories: getCategory(item)
       };
diff --git a/src/pages/llmodels/config/index.ts b/src/pages/llmodels/config/index.ts
index 3f993f50..61263eeb 100644
--- a/src/pages/llmodels/config/index.ts
+++ b/src/pages/llmodels/config/index.ts
@@ -340,6 +340,31 @@ export const setbackendParameters = (data: any) => {
   return result;
 };
 
+// extract the key of a backend parameter.
+// supported formats: '--key', '--key=value', '--key value'
+export const getBackendParameterKey = (param: string): string => {
+  const trimmed = String(param).trim();
+  const matched = trimmed.match(/^([^=\s]+)/);
+  return matched ? matched[1] : trimmed;
+};
+
+// merge two backend_parameters lists and dedupe by key.
+// params from `priorityParams` (e.g. defaultSpec) win over `baseParams`.
+export const mergeBackendParameters = (
+  baseParams: string[] = [],
+  priorityParams: string[] = []
+): string[] => {
+  const priorityKeys = new Set(
+    priorityParams.map((param) => getBackendParameterKey(param))
+  );
+
+  const filteredBase = baseParams.filter(
+    (param) => !priorityKeys.has(getBackendParameterKey(param))
+  );
+
+  return [...filteredBase, ...priorityParams];
+};
+
 export const modelLabels = [
   { label: 'Image', value: 'image_only' },
   { label: 'Text-to-speech', value: 'text_to_speech' },