This is a fix for referendum 62, which passed but failed to execute properly. Details of the problem and how to fix are in this [HackMd](https://hackmd.io/qAT35jE2Sn6IjBXlMXfuBg?view).

Schedule a majority-carries referendum to be tabled next once it is legal to schedule
an external referendum.

The dispatch of this call must be `ExternalMajorityOrigin`.

- `proposal_hash`: The preimage hash of the proposal.

Unlike `external_propose`, blacklisting has no effect on this and it may replace a
pre-scheduled `external_propose` call.

Weight: `O(1)`

- There was a problem with a referendum called 62.
- The problem made it so the referendum didn't work correctly.
- The post has details on how to fix the problem.
- You can read more about it in the HackMd link.
- The problem is being fixed so the referendum can work properly.

#216 Fix: Establish HRMP Channels for Statemint