alter table music_sessions_comments
add column ip_address inet;

alter table music_sessions_likers
add column ip_address inet;

alter table music_sessions_likers
alter column liker_id drop not null;

alter table recordings_comments
add column ip_address inet;

alter table recordings_likers
add column ip_address inet;

alter table recordings_likers
alter column liker_id drop not null;

alter table recordings_plays
add column ip_address inet;

alter table recordings_plays
alter column player_id drop not null;