I’ve been trying to create a new permissions document. I tried using sanity exec But I get the error: ClientError: The mutation(s) failed: mutation failed on document

ClientError: The mutation(s) failed: mutation failed on document "_.groups.corePagesEditors": Insufficient permissions; permission "manage" required

const sanityClient = require('@sanity/client');

const client = sanityClient({
  projectId: 'projectId',
  dataset: 'myDataset',
  token:
    'someToken',
});

const doc = {
  _id: '_.groups.corePagesEditors',
  _type: 'system.group',
  grants: [
    {
      filter: "_type == 'corePage'",
      permissions: ['editHistory'],
    },
  ],
  members: ['someId'],
};

client.create(doc).then((res) => {
  // eslint-disable-next-line no-console
  console.log(`Document was created, document ID is ${res._id}`);
});