The error you are getting because AngularJS does not allow duplicates in an ng-repeat directive. This means if you are trying to do the following, you will get an error.
<div ng-repeat="row in [1,1,1]">
However, you can get rid of that error by changing the above code slightly to define an index to determine uniqueness as below will get it working again.
<div ng-repeat="row in [1,1,1] track by $index">