Remove null from the Pie Chart legend.

[NasratullahOmari]

Hello everyone, 
I am adding a Pie chart to my dashboard, but a Null value is added to my Pie Chart legend. How can I remove that from the legend? See below I can delete any other value but cannot delete the null value.

[JohannesLindner · Accepted solution]

You can filter out null values, then the legend item shouldn't be there anymore.

[NasratullahOmari]

Thank you so much @JohannesLindner!