Multi axes chart: Duplicated legend data

Hi,

I have an issue with multi axes chart.

I have a situation as on the picture below:

The question is: How to remove duplicates of legend and this text: “- TotalExpenses” and “- TotalReloads”?

I have only Axis 1 with two values, one series type as a column stacked and the second one as a column chart.

I want only legend with the VAT rate in percents.