Single element produces multiple lines on graph

Using Grafana 9.1.6 on Linux I am trying to chart some data in a time series. For reasons I can’t understand this single metric is producing two seperate lines on the graph. So here are some images to show what I mean…

Given this data…

And this query…

Why do I get 2 lines and not the one line I’m expecting?

Thanks for any help you can give me.

Hi @bowringjb,

Welcome to the :grafana: community support forums !!

We are excited that you joined our OSS community. Please read about some of the FAQs in the community :slight_smile:

Could you please copy/paste all relevant data using the panel --> more --> get help workflow in the panel’s dropdown menu?

This will help us mock up your data and reproduce your issue. It is important to our teams that issues get verified as reproducible before we formally mark them as bugs.

Thank you!

Here are more details and steps for copying your data over to this issue:

CleanShot 2023-01-31 at 14 40 21