Q: How to associate several series with one Yaxis in multi-Yaxis charts

[evil-shrike]

I'm trying to create a chart with several series per Yaxis. When I have two series and only one Y-axis, it works as expected.
Please the example:

      chartOptions: {
        chart: {
          type: 'line',
        },
        title: {
          text: 'Multi-Yaxis demo',
        },
        xaxis: {
          categories: [2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016]
        },
        yaxis: [
          {
            title: {
              text: 'Conversions',
            },
          },
        ],
      },
      series: [
            {
              name: 'test',
              data: [1.4, 2, 2.5, 1.5, 2.5, 2.8, 3.8, 4.6]
            }, {
              name: 'control',
              data: [1.1, 3, 3.1, 4, 4.1, 4.9, 6.5, 8.5]
            }, 

      ]

I'm using Vue3 wrapper.
https://codesandbox.io/s/vue-basic-example-forked-kdh42q?file=/src/components/Chart.component.vue

Note the names of a series are used in legend to identify the series.

Now I want to add another pair of graphs at the same chart with another Y-axis on the right.
How should I do it?

Here's what I tried. I added another yaxis:

        yaxis: [
          {
            title: {
              text: 'Conversions',
            },
          },  {
            seriesName: 'Value',
            opposite: true,
            title: {
              text: 'Value',
            },
          }
        ],

As we have to (I guess) explicitly associate series with an axis, it should be named. But how to create several series with the same name?

I can create a series per axis:

      series: [
            {
              name: 'conversions',
              data: [1.4, 2, 2.5, 1.5, 2.5, 2.8, 3.8, 4.6]
            }, {
              name: 'values',
              data: [100, 200, 300, 400, 500, 600, 700, 800]
            }
      ],
          chartOptions: {
            yaxis: [
              {
                seriesName: 'conversions',
                title: {
                  text: 'Conversions',
                },
              }, {
                seriesName: 'values',
                opposite: true,
                title: {
                  text: 'Value',
                },
              }
            ],
    }

it works. But as I need several series per axis.
As soon as I add another data series with the same name it fails
(TypeError: Cannot read properties of undefined (reading 'push')).

Unfortunately the doc says nothing about named series - https://apexcharts.com/docs/series/