Merge pull request #3118 from metabase/fix-custom-column-single-series-charts

Fix custom column single series charts

frontend/src/metabase/visualizations/components/LineAreaBarChart.jsx

@@ -124,10 +124,10 @@ export default class LineAreaBarChart extends Component {
                         cols: rowIndexes.map(i => s.data.cols[i])
                     }
                 }));
-            } else if (metrics.length > 1) {
+            } else {
                 const dimensionIndex = dimensionIndexes[0];
 
-                nextState.isMultiseries = true;
+                nextState.isMultiseries = metrics.length > 1;
                 nextState.series = metricIndexes.map(metricIndex => {
                     const col = cols[metricIndex];
                     return {