Label names duplicated in legend when expression is used in panel

[gautamg795]

This is a weird bug that so far, I've only been able to track down to the VictoriaMetrics datasource -- the issue disappears when using the Prometheus datasource, and does not occur if the panel doesn't contain an "expression".

This is the desired panel output, when using the Prometheus datasource:

However switching to the VictoriaMetrics datasource makes the legend look like this:

Every legend entry is duplicated!

Attempting to set the legends back to "auto" didn't work either, and I end up with __auto __auto

[hagen1778]

@Loori-R I see that #97 was merged and released. Does it mean we can close the issue?

[Loori-R]

The bugfix has been included in victoriametrics-datasource v0.4.0.