Updating ERPNext fields via API

Integration
1

I’m trying to sync ERPnext with MYOB AccountRight Live using n8n - specifically update a field called custom_myob_uid

in my Item doctype. I am trying to PUT using the below code:

const items = $input.all()[0].json.Items;

return items
  .filter(item => item.Number) // Ensure only items with a Number are processed
  .map(item => ({
    json: {
      method: 'PUT',
      url: 'https://[hostname]/api/resource/Item/' + encodeURIComponent(item.Number),
      headers: {
        'Content-Type': 'application/json',
        'Accept': 'application/json'
      },
      body: {
        custom_myob_uid: item.UID
      }
    }
  }));

Running this should output the returned data, but it is not updating anything, and I get this as the response:

{

"method": "PUT",

"url": "https://[hostname]/api/resource/Item/[item ID]",

"headers": {

"Content-Type": "application/json",

"Accept": "application/json"

},

"body": {

"custom_myob_uid": "[valid UID]"

}

},

But viewing the form itself does not show me the data. Is there something I’m doing wrong?