On [2022-12-12](https://kusama.subsquare.io/referenda/referendum/16) this [referendum proposal](https://kusama.polkassembly.io/referenda/16) was executed to, among other things, lower the `min_untrusted_score` to deal with a [mass slashing incident](https://forum.polkadot.network/t/kusama-era-4543-slashing/1410) in Kusama.

This proposal aims at updating the current `min_unstrusted_score` in Kusama back to sensible values. The new minimum untrusted score was calculated by averaging the last 30 election scores and halving them (starting from election at block [#17416892](https://kusama.subscan.io/block/17416892)).

When enacted, this proposal will change the current untrusted minimum score in Kusama from

```
{
  minimalStake: '1,722,238,583,242,009',
  sumStake: '2,171,296,385,410,646,127',
  sumStakeSquared: '62,184,223,048,402,160,114,561,549,513,680,866'
}
```

to
```
{
  minimalStake: '2,957,640,724,907,066',
  sumStake: '3,471,819,933,857,856,584',
  sumStakeSquared: '78,133,097,080,615,021,100,202,963,085,417,458'
}
```

--- 

## Why is this change important?

The [`MinimumUntrustedScore`](https://github.com/paritytech/substrate/blob/master/frame/election-provider-multi-phase/src/lib.rs#L1326) configuration defines the minimum election score that will be accepted by the elections pallet from off-chain staking miners. Increasing the minimum untrusted score ensures that weak election solutions will not be accepted. The proposed election score is more sensible and secure given the current state of the network. 


Set a new value for `MinimumUntrustedScore`.

Dispatch origin must be aligned with `T::ForceOrigin`.

This check can be turned off by setting the value to `None`.

- There was a problem with Kusama called a mass slashing incident.
- A proposal was made to fix the problem by changing the minimum untrusted score.
- The new minimum untrusted score was calculated by averaging the last 30 election scores and halving them.
- The current minimum untrusted score will change to a new value.
- This change is important to make the network more secure.

#151 Update elections' minimum untrusted score