AngularJS does not allow to use duplicate keys in the ng-repeat expression, in our case, when we have just one item, the 3 columns left are with the key undefined, so AngularJS translate that as a duplicate key, the solution is simple and is provided by the docs:
AngularJS does not allow to use duplicate keys in the
ng-repeatexpression, in our case, when we have just one item, the 3 columns left are with the keyundefined, so AngularJS translate that as a duplicate key, the solution is simple and is provided by the docs:https://docs.angularjs.org/error/ngRepeat/dupes