In `kwinrc`, set the `ElectricBorders` and/or `Windows` group immutable or any entry.
```
[ElectricBorders]
BottomLeft[$i]=None
Left=None
Right=None
Top[$i]=None
[Windows][$i]
ElectricBorderCornerRatio=0.29
ElectricBorderDelay=300
ElectricBorderMaximize=false
ElectricBorderTiling=true
ElectricBorders=2
```