vue3中使用ts，报错Cannot redeclare block-scoped variable 'props'

ts一直报这种错误，有木有对vue3+ts有了解的大大解答一下怎么解决

<template>
  <button @click="add">add num</button>
</template>

<script lang="ts" setup>
const props = defineProps<{
  modelValue: number
}>()
const emit = defineEmits<{
  (event: 'update:modelValue', i: number): void
}>()
let i = 0
const add = () => {
  i++
  emit('update:modelValue', i)
}
</script>

无法重新声明块范围变量“props”