v-model cannot be used on v-for

Question

VueCompilerError: v-model cannot be used on v-for or v-slot scope variables because they are not writable. Why?

<template>
  <div v-for="service in services" :key="service.id">
    <ServicesItem v-model="service"></ServicesItem >
  </div>
</template>
<script lang="ts">
import ServicesItem from "@js/components/ServicesItem.vue"

export default defineComponent({
  components: { ServicesItem },
  setup() {
    const services = ref([
      {
        id: 1,
        name: "Service 1",
        active: false,
        types_cars: {
          cars: {},
          suv: {},
        },
      },
    ])

    return {
      services,
    }
  },
})
</script>

What are the best practices? Reactive object transfers