Facing an Issue while updating the value of customfield using forge app

[Sunilkumar k]

Hi,

I am trying to to update the value custom field through forge app by using an api in the way shown below.

let newbody2 =

`{

  "fields": {

      "customfield_10033": ${parseInt(formData.newstory)}

      }     

  }`;

console.log("Body created by the issueid is= " + JSON.stringify(newbody2));

    const response2 = await api.asApp().requestJira(route`/rest/api/3/issue/PLUG-1`, {

      method: `PUT`,

      headers: {

        'Accept': 'application/json',

        'Content-Type': 'application/json'

     },

      body: newbody2

    });

I am able to update the value in the custom field but throwing an error Saying that "SyntaxError: Unexpected end of JSON input"

Though it is throwing the error  iam able to post the data in custom field.

please help me in resolving this.