# 66. Mutaatio: tallenna lohko

Muutos olemassa olevan "Pelto"-kohteen rajausten ja/tai nimen korjaamiseksi. 

{% hint style="info" %}
Muokkaaaksesi olemassa olevan "Pelto"-kohteen rajaa käytä `registerField` muuta.
{% endhint %}

{% code overflow="wrap" lineNumbers="true" %}

```graphql
muutos SaveFieldSample {
  saveField(
    syöte: { 
      uuid: "<placeholder_of_field_uuid>"
      farmUuid: "<placeholder_of_farm_uuid>"
    	 nimi: "Pelto_nimi" 
    }
  ) {
    uuid
    farmUuid
    nimi
    rajaUrl
    topografiaKartat {
      uuid
      fieldUuid
      tila
      geoKartat {
        lyhytNimi
        url
        hexVärikoodit
        luokat
      }
    }
    etiketit {
      nimi
      arvo
    }
  }
}
```

{% endcode %}


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