The `knocked_members` column of `room_stats_state` is nullable while all other columns are not

[anoadragon453]

synapse=> \d room_stats_current
                  Table "public.room_stats_current"
          Column           |  Type   | Collation | Nullable | Default 
---------------------------+---------+-----------+----------+---------
 room_id                   | text    |           | not null | 
 current_state_events      | integer |           | not null | 
 joined_members            | integer |           | not null | 
 invited_members           | integer |           | not null | 
 left_members              | integer |           | not null | 
 banned_members            | integer |           | not null | 
 local_users_in_room       | integer |           | not null | 
 completed_delta_stream_id | bigint  |           | not null | 
 knocked_members           | integer |           |          | 
Indexes:
    "room_stats_current_pkey" PRIMARY KEY, btree (room_id)

Might have been missed in #6739?

[richvdh]

https://github.com/matrix-org/synapse/pull/6739/files#diff-c67deb2bd4c18ee19be0d7a2d3cd30854225a461098f54c0013a213efbfe78b7R16 claims it should be NOT NULL ?

[anoadragon453]

D'oh! I must be running off an earlier version of that migration file. It is indeed marked as not null on matrix.org and I assume everywhere else.

Sorry for the noise!