perf: remove request invalid field (#6283)

document/content/docs/upgrading/4-14/4145.mdx

 ---
-title: 'V4.14.5'
+title: 'V4.14.5(包含升级脚本)'
 description: 'FastGPT V4.14.5 更新说明'
 ---
 

document/content/docs/upgrading/4-14/4146.mdx

@@ -12,6 +12,7 @@ description: 'FastGPT V4.14.6 更新说明'
 
 1. 工作流触摸板移动时，遇到输入框后会被强制阻拦。
 2. 工作流粘贴节点，精确按鼠标位置粘贴。
+3. 精确移除请求 LLM 时多余的系统字段，避免部分模型接口报错。
 
 ## 🐛 修复
 

document/data/doc-last-modified.json

@@ -122,7 +122,7 @@
   "document/content/docs/upgrading/4-14/4142.mdx": "2025-11-18T19:27:14+08:00",
   "document/content/docs/upgrading/4-14/4143.mdx": "2025-11-26T20:52:05+08:00",
   "document/content/docs/upgrading/4-14/4144.mdx": "2025-12-16T14:56:04+08:00",
-  "document/content/docs/upgrading/4-14/4145.mdx": "2026-01-12T08:50:15+08:00",
+  "document/content/docs/upgrading/4-14/4145.mdx": "2026-01-13T19:11:02+08:00",
   "document/content/docs/upgrading/4-14/4146.mdx": "2026-01-12T21:07:44+08:00",
   "document/content/docs/upgrading/4-8/40.mdx": "2025-08-02T19:38:37+08:00",
   "document/content/docs/upgrading/4-8/41.mdx": "2025-08-02T19:38:37+08:00",

packages/service/core/ai/llm/utils.ts

@@ -230,6 +230,9 @@ export const loadRequestMessages = async ({
     const result = (
       await Promise.all(
         content.map(async (item) => {
+          // Remove system filed
+
+          delete item.key;
           if (item.type === 'text') {
             // If it is array, not need to parse image
             if (item.text) return item;