Energy dashboard - individual device power to high

Configuration
1

Hi, i use the energy dashboard inside homeassistant with a few individual devices (smart plugs).

When i check the consumption for december i get for the entity “Media Steckdose Energy” a value of 345,51kWh.

I have this smart plug since december 2021 and a total value of 339,95kWh.
What have i misconfigured to get this extremly high value for just one month?

2

Yeah… it was a wrong readout in the middle of the month at 6 in the morning.
After correcting the value, the energy dashboard is correct again.