When inserting custom data into the Data Table element I am getting the following error: Encountered two children with the same key, NaN. Keys should be unique so that components maintain their identity across updates. Non-unique keys may cause children to be duplicated and/or omitted — the behavior is unsupported and could change in a future version'

This only occurs when the second page is generated. Below is the data I am using to generate the table. Having 10 items on the first page only does not show the error, but as soon as I add in enough items to generate another page, the error occurs. As far as I can tell, I am formatting the data correctly as the error doesn't occur without the second page.

Any help?

const tableData = {
  columns: [
{
  label: 'Time Added',
  field: 'timeAdded',
  sort: 'asc',
  width: 270,
},
{
  label: 'Completed',
  field: 'completed',
  sort: 'asc',
  width: 100,
},
{
  label: 'Results',
  field: 'results',
  sort: 'asc',
  width: 50,
},

  ],
  rows: [
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},{
  timeAdded: '2019-01-27T12:25:57-07:00',
  completed: '23',
  results: '4',
},
  ],
};