diff --git a/src/main/config/override.test.tsx b/src/main/config/override.test.tsx
new file mode 100644
index 00000000..9fb59e76
--- /dev/null
+++ b/src/main/config/override.test.tsx
@@ -0,0 +1,82 @@
+import { mkdtempSync, readFileSync, rmSync, writeFileSync } from 'fs'
+import { tmpdir } from 'os'
+import { join } from 'path'
+import React from 'react'
+import { renderToString } from 'react-dom/server'
+import { SortableContext } from '@dnd-kit/sortable'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import {
+  getOverride,
+  getOverrideConfig,
+  getOverrideItem,
+  setOverrideConfig,
+  updateOverrideItem
+} from './override'
+
+let testDir = ''
+
+vi.mock('../utils/dirs', () => ({
+  overrideConfigPath: () => join(testDir, 'override.yaml'),
+  overridePath: (id: string, ext: string) => join(testDir, `${id}.${ext}`)
+}))
+vi.mock('../utils/chromeRequest', () => ({ get: vi.fn() }))
+vi.mock('./controledMihomo', () => ({ getControledMihomoConfig: vi.fn() }))
+
+beforeEach(() => {
+  testDir = mkdtempSync(join(tmpdir(), 'clash-party-override-test-'))
+})
+
+afterEach(() => {
+  rmSync(testDir, { recursive: true, force: true })
+})
+
+function writeConfig(id: string): void {
+  writeFileSync(
+    join(testDir, 'override.yaml'),
+    `items:\n  - id: ${id}\n    name: Existing override\n    type: local\n    ext: js\n    updated: 0\n`
+  )
+}
+
+describe('legacy numeric override IDs', () => {
+  it.each([
+    ['.inf', 'Infinity'],
+    ['-.inf', '-Infinity'],
+    ['.nan', 'NaN'],
+    ['123456', '123456'],
+    ['19e86409178', 'Infinity'],
+    ['"19e86409178"', '19e86409178']
+  ])('keeps %s usable after JSON transport', async (yamlId, expectedId) => {
+    writeConfig(yamlId)
+    const config = await getOverrideConfig(true)
+    // SortableContext probes object IDs with `in`; null would throw here.
+    const ids = JSON.parse(JSON.stringify(config)).items.map((item: IOverrideItem) => item.id)
+    expect(() =>
+      renderToString(<SortableContext items={ids}>{null}</SortableContext>)
+    ).not.toThrow()
+    expect(config.items[0].id).toBe(expectedId)
+    expect((await getOverrideItem(expectedId))?.name).toBe('Existing override')
+  })
+
+  it('matches and persists the same ID during a queued update', async () => {
+    writeConfig('.inf')
+    const { items } = await getOverrideConfig(true)
+    await updateOverrideItem({ ...items[0], global: true })
+    const saved = await getOverrideConfig(true)
+    expect(saved.items).toEqual([{ ...items[0], global: true }])
+    expect(readFileSync(join(testDir, 'override.yaml'), 'utf8')).toContain('id: Infinity')
+  })
+
+  it('preserves access to the existing override file', async () => {
+    writeConfig('.inf')
+    writeFileSync(join(testDir, 'Infinity.js'), 'function main(config) { return config }')
+    const { items } = await getOverrideConfig(true)
+    expect(await getOverride(items[0].id, items[0].ext)).toContain('function main')
+  })
+
+  it('normalizes IDs before the setter JSON clone', async () => {
+    writeConfig('.inf')
+    const { items } = await getOverrideConfig(true)
+    await setOverrideConfig({ items: [{ ...items[0], id: Infinity as unknown as string }] })
+    expect((await getOverrideConfig(true)).items[0].id).toBe('Infinity')
+  })
+})
diff --git a/src/main/config/override.ts b/src/main/config/override.ts
index e4359309..27cce9d5 100644
--- a/src/main/config/override.ts
+++ b/src/main/config/override.ts
@@ -14,6 +14,17 @@ let overrideConfigVersion = 0
 // 与 profile.yaml 共用（见 runtimeConfigQueue.ts）
 const overrideConfigWriteQueue = runtimeConfigWriteQueue
 
+// Legacy YAML can contain numeric IDs (including .inf). Convert them before
+// JSON cloning turns non-finite numbers into null, breaking the sortable UI.
+function normalizeOverrideIds(config: IOverrideConfig): IOverrideConfig {
+  if (Array.isArray(config.items)) {
+    config.items = config.items.map((item) =>
+      item && typeof item.id === 'number' ? { ...item, id: String(item.id) } : item
+    )
+  }
+  return config
+}
+
 export async function getOverrideConfig(force = false): Promise<IOverrideConfig> {
   if (force || !overrideConfig) {
     const seen = overrideConfigVersion
@@ -24,12 +35,12 @@ export async function getOverrideConfig(force = false): Promise<IOverrideConfig>
   }
   if (typeof overrideConfig !== 'object') overrideConfig = { items: [] }
   if (!Array.isArray(overrideConfig.items)) overrideConfig.items = []
-  return JSON.parse(JSON.stringify(overrideConfig)) as IOverrideConfig
+  return JSON.parse(JSON.stringify(normalizeOverrideIds(overrideConfig))) as IOverrideConfig
 }
 
 export async function setOverrideConfig(config: IOverrideConfig): Promise<void> {
   await overrideConfigWriteQueue.run(async () => {
-    const nextConfig = JSON.parse(JSON.stringify(config)) as IOverrideConfig
+    const nextConfig = JSON.parse(JSON.stringify(normalizeOverrideIds(config))) as IOverrideConfig
     await atomicWriteFile(overrideConfigPath(), stringify(nextConfig), { encoding: 'utf8' })
     overrideConfig = nextConfig
     overrideConfigVersion++
@@ -47,7 +58,9 @@ export async function updateOverrideConfig(
       throw new Error('Override config is invalid')
     }
     if (!Array.isArray(currentConfig.items)) currentConfig.items = []
-    const nextConfig = updater(JSON.parse(JSON.stringify(currentConfig)) as IOverrideConfig)
+    const nextConfig = updater(
+      JSON.parse(JSON.stringify(normalizeOverrideIds(currentConfig))) as IOverrideConfig
+    )
     await atomicWriteFile(overrideConfigPath(), stringify(nextConfig), { encoding: 'utf8' })
     overrideConfig = nextConfig
     overrideConfigVersion++
diff --git a/vitest.config.ts b/vitest.config.ts
index 6045e2e7..a90ed3d3 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -2,7 +2,7 @@ import { defineConfig } from 'vitest/config'
 
 export default defineConfig({
   test: {
-    include: ['src/**/*.test.ts', 'scripts/**/*.test.ts'],
+    include: ['src/**/*.test.{ts,tsx}', 'scripts/**/*.test.ts'],
     environment: 'node'
   }
 })