Issue with Grafana Override Persistence in InfluxDB for Summing Two Inverters' Power Output

Grafana Dashboards
1

Hello, I’m logging the data from my PV system into an InfluxDB and would like to visualize it with Grafana 10.1.4. All runs on an RaspberryPI4.

My problem: I have two inverters and would like to create the sum of their power outputs. This works perfectly in InfluxDB, and in the explorer, it only shows me the sum:

from(bucket: "smarthome")
  |> range(start: v.timeRangeStart, stop: v.timeRangeStop)
  |> filter(fn: (r) => r["_measurement"] == "power-stats")
  |> filter(fn: (r) => r["_field"] == "Leistung_WR1" or r["_field"] == "Leistung_WR2")
  |> aggregateWindow(every: 1m, fn: mean, createEmpty: false)
  |> pivot(rowKey: ["_time"], columnKey: ["_field"], valueColumn: "_value")
  |> map(fn: (r) => ({r with _value: r.Leistung_WR1 + r.Leistung_WR2}))

Now, when I insert this into Grafana, it shows me the values for Inverter1 (WR1), Inverter2 (WR2), and the sum. I use the Override → Hide in Area, so it shows only the sum, but when I go back to the dashboard and it refreshes, it somehow overrides the override, and I see the old display with the three values.

Does anyone have advice?