Highcharts sankey problem fix (Demo http://jsfiddle.net/vh4792wy/39/ )

index.html

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/sankey.src.js"></script>

<div id="container"></div>

sankey.js

var StandartDatam=[
              
        { from: "F18 - Bella Italia", to: "F01-Administration", weight: 410 },
        { from: "F54 - Italian Village", to: "F01-Administration", weight: 327 },
        { from: "F42-Ferrari Store", to: "F01-Administration", weight: 325 },
        { from: "F02 - G-Force", to: "F01-Administration", weight: 294 },

        { from: "Unknown", to: "F01-Administration", weight: 290 },

        { from: "F01-Administration", to: "F54 - Italian Villag e", weight: 465 },
        { from: "F01-Administration", to: "F59 - Go Kart", weight: 462 },
        { from: "F01-Administration", to: "Unknown", weight: 451 },
        { from: "F01-Administration", to: "F18 - Bella Italia", weight: 422 },
        { from: "F01-Administration", to: "F02 - G-Force", weight: 335 },
        /*
        {from:"F01-Administration1", to: "Unknown ",    weight: 451},
        {from:"F01-Administration1", to: "F18 - Bella Italia ",   weight:  422},
        {from:"F01-Administration1", to: "F02 - G-Force ",    weight: 335},
        
        {from:"F01-Administration1", to: "Unknown",    weight: 188},
        {from:"F01-Administration1", to: "F18 - Bella Italia",   weight:  422},
        {from:"F01-Administration1", to: "F02 - G-Force",    weight: 335},
        */
        { from: "F02 - G-Force1", to: "f45", weight: 335 },
        { from: "f45", to: "f46", weight: 335 },
        { from: "f46", to: "f47", weight: 335 },
        { from: "f47", to: "f46", weight: 335 },
  
];

var DataFixer = data => {
        const ArrayGroup = data.reduce(function (r, a) {
                    r[a.to] = r[a.to] || [];
                    r[a.to].push(a);
                    return r;
                }, Object.create(null));
                //object to array
                var myArr = Object.keys(ArrayGroup).map(function (x) { return ArrayGroup[x]; })
                var array = [];
                var arrayMerge = [];
                let  ArrayCount = myArr.length;
                //root array
                for (var i = 0; i < ArrayCount; i++) {
                    var merged = myArr[i];
                    var counter = merged.length;
                    if (counter > 1) {
                        if (merged[0].to == merged[1].to) {
                            //array subcategory
                            for (var ia = 0; ia < merged.length; ia++) {
                                arrayMerge.push({
                                    from: merged[ia].from,
                                    to: merged[ia].to + ' ',
                                    weight: merged[ia].weight,
                                });
                                delete merged[ia]
                            }
                        }
                    }
                    Array.prototype.push.apply(array, merged);
                }
                Array.prototype.push.apply(array, arrayMerge);
                var result  = array.filter(function( element ) {
                    return element !== undefined;
                });
                return result;
};

var StandartData=DataFixer(StandartDatam)

Highcharts.chart('container', {

  title: {
    text: 'Highcharts Sankey Diagram'
  },


  series: [{

       data:StandartData,

    type: 'sankey',
    name: 'Sankey demo series'
  }]



});