Chart.js - линейная диаграмма с двумя yAxis: "TypeError: yScale undefined"

Я пытаюсь отобразить линейную диаграмму с двумя yAxis в Chart.js.

Мой код:

 window.onload = function() {
   var ctx = document.getElementById("chart").getContext("2d");
   var myChart = new Chart(ctx, {
     type: "line",
     data: {
       "labels": [
         "01.12.2015",
         "02.12.2015",
         "03.12.2015",
         "04.12.2015",
         "30.12.2015"
       ],
       "datasets": [{
         "label": "DEA Burrweiler Druck Abgabe",
         "fill": "false",
         yAxisID: "y-axis-0",
         "data": [
           8.7913,
           8.6985,
           8.7914,
           8.7948,
           8.7882
         ]
       }, {
         "label": "DEA Burrweiler Druck Zulauf",
         "fill": "false",
         yAxisID: "y-axis-0",
         "data": [
           4.5997,
           4.5526,
           4.5915,
           4.5937,
           4.5795
         ]
       }, {
         "label": "DMS Flemlingen Durchfluss",
         "fill": "false",
         yAxisID: "y-axis-1",
         "data": [
           1.9588,
           2.4226,
           2.1392,
           2.223,
           1.9048
         ]
       }]
     },
     options: {
       yAxes: [{
         position: "left",
         "id": "y-axis-0"
       }, {
         position: "right",
         "id": "y-axis-1"
       }]
     }

   });
 };

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.0/Chart.min.js"></script>
<canvas id="chart" width="400" height="400"></canvas>